Hi all,
Can I please get some advice from someone who might know better than me. I have been using the following charger on my travels to charge an iPad and Samsung galaxy nexus at the same time:
http://www.amazon.co.uk/Skross-Char...?s=electronics&ie=UTF8&qid=1342643375&sr=1-23
I've just plugged my nexus 7 in on its own and I get nothing.
I didn't think the nexus would need a higher amp than the iPad? The Asus plug that's charging the nexus says its 2amp and the travel charger says its 6.5amp. Am I being amazingly blind or stupid here?
And if I need a new travel charger for my trips into Europe can I have some advice on what to buy before I buy something else useless.
Thanks all!
Sent from my Nexus 7 using xda premium
Nexus 7 trouble with other chargers
I see the same issue.
The Nexus 7 charger lists: Output 5.0V===2.0A, Nexus 7 will charge.
iPad 2's charger shows: Output 5.1V===2.1A;Max 10Watt, Nexus 7 will not charge,
Philips universal charger: Output 5V===2A; Max 10Watt, Nexus 7 will not charge.
Blackberry phone charger Output 5V===500mA, Nexus 7 will not charge.
Blackberry phone charger Output 5V===700mA, Nexus 7 will charge.
To answer the OP: The Amazon product page clearly states Output 5.0 VDC / 1000 mA max. N7 needs 2000 mA (2A). Derping in public again. Don't mind me. :silly:
To add to the list:
Samsung Galaxy Tab 2 7.0 Charger: Output 5V ⎓ 2A; Max 10Watt, Nexus 7 will charge.
XtremeMac IPU-IH2-11: Output 5V ⎓ 4.2A (2.1A per port); Max 20Watt, Nexus 7 will not charge. (Galaxy Tab 2 7.0 charges though.)
The N7 seems very picky about chargers, unfortunately. My XtremeMac is now powering my charge cables for my wireless mouse and keyboard, freeing up 2 USB ports, so not all is lost I guess.
I have a 2.1a car charger, but it doesn't charge it.
http://www.amazon.com/gp/product/B007TV88F2/ref=oh_details_o00_s00_i00
EDIT: Interesting. It will not work on the car charger wiht my "charging only cable" which has shorted out datapins to register as an AC source. But, it does charge on a normal USB cable.
I have a tf201 charger (here i refer to the usb block, not the cable) that seems to super charge the nexus 7, that is to say, very fast. The tf201 charger is 18 watts. Also, I have noticed my usb 2.0 ports on my desktop will not charge the n7, but my usb 3.0 ports will.
Sent from my Nexus 7 using Tapatalk 2
I started a related thread asking if anyone has examined the proprietary aspects of the charger here:
http://forum.xda-developers.com/showthread.php?t=1780211
Basically, we should be able to build (or eventually buy) some type of adapter to enable proper charging with any 2A charger after we figure out exactly what the charger is doing. I wouldn't be surprised if all Asus tablet chargers already worked properly without an adapter.
zinfinion said:
To answer the OP: The Amazon product page clearly states Output 5.0 VDC / 1000 mA max. N7 needs 2000 mA (2A).
Click to expand...
Click to collapse
This answer is clouding up a lot of legitimate discussions. The current rating doesn't matter to this conversation at all. If the current is above 0 the device should show the charging icon. If not, there is some other problem.
qoncept said:
This answer is clouding up a lot of legitimate discussions. The current rating doesn't matter to this conversation at all. If the current is above 0 the device should show the charging icon. If not, there is some other problem.
Click to expand...
Click to collapse
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.
zinfinion said:
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.
Click to expand...
Click to collapse
Agreed. I bought a pair of dual 2A chargers and neither of them will charge it at all (no charging icon). I tried shorting the data lines and still nothing. The dual charger that came with my Razr will charge it slowly (about 16 hours from 0 to 100%). My old 700ma Blackberry charger works just better than anything other than the OEM charger. Frustrating and I don't want to keep ordering different chargers with my fingers crossed.
zinfinion said:
You are correct that my remark about the OP's charger's current was not a valid point. I have stricken it from the record.
That said, some serious weirdness is going on with the N7 regardless. On the XtremeMac charger the N7 will charge. But incredibly slowly, and the battery status reads as discharging, even though the line on the battery graph is rising. I don't even know where to begin in trying to explain that.
Click to expand...
Click to collapse
I don't know what a XtremeMac charger is, but I'm assuming it's for charging an iphone or ipad or something? the Nexus 7 and the apple products don't share the same charger design, so the Nexus is probably only drawing 500mA while charging from it.
You can also add the MonoPrice 8856 charger to the list that do not work with Nexus 7
Mine is charging with Galaxy Nexus 5.0v 1.0A charger.
Sent from my Nexus 7 using Tapatalk 2
I have two chargers that work.
1: Nokia 1.2a fast charger
2: Blackberry 1.8a charger
both have integrated charging cables, which are 6ft in length.
The Asus transformer prime which is a USB charger with proprietary cord also has something weird. Other USB chargers with the same power specs connected with the Asus USB cable won't charge the prime. Or they charge where it literally takes like 24 hours to reach 100 percent.
There's something different in that Asus power plug on both devices it seems.
Sent from my Nexus 7 using xda premium
I'm not sure what It's output is but the standard Verizon branded micro usb charger does a great job charging my N7. I think they for sell around $30 in the VZW stores tho.
The 1.0a charger that came with my LG Revo works great, almost as fast stock. I bought 2 extra of that charger on amazon about 9months ago for under 10 for the pair.
Also the charger for my old Droid (.7a iirc) works as well, but it's slow as hell with the screen off, and barely keeps up with just web surfing.
The Charger with the HTC Desire seems to be charging - though slowly as its a 1A charger.
Does anyone know whether the International Samsung Galaxy S II charger works?
The TF101 charger works great, and fast too - about 1% a minute.
My Samsung SG2 (i777) charger seems to work with the N7
Related
I was just wondering if anyone here has spotted a Nexus 7 car charger? Does it not matter if it's not specifically made for the Nexus 7? I'm trying to find one to buy online and I'm having some troubles. First post here I think I came to the right place though. :laugh:
Silversub745 said:
I was just wondering if anyone here has spotted a Nexus 7 car charger? Does it not matter if it's not specifically made for the Nexus 7? I'm trying to find one to buy online and I'm having some troubles. First post here I think I came to the right place though. :laugh:
Click to expand...
Click to collapse
Clicked thanks on accident lol. Any USB car charger should work, but I would make sure you grap a 1 amp one just so it has enough output to charge the tablet at a decent rate.
probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.
vroomr4 said:
probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.
Click to expand...
Click to collapse
Heck, I didn't even know they had 2 amp ones.
vroomr4 said:
probably better with a 2amp one. samsung makes one for the tab2, about $12 on amazon, and just use your own microusb cable to connect to it.
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Click to collapse
Yup, go with a 2Amp one. Most of the cigarette lighter usb chargers are 2.1A.
Avoid the cheap Chinese 2+Amp car chargers, they can be so badly made they cause enough interference to wipe out your FM radio.
/edit 1Amp will be fine but don't go lower, the N7 would likely burn it out.
FYI I tried a 5v 1a wall charger and my gnex7 said f u wouldn't take the charge. 2a or nothing I say
Sent from my Nexus 7 using xda app-developers app
Troute said:
Avoid the cheap Chinese 2+Amp car chargers, they can be so badly made they cause enough interference to wipe out your FM radio.
/edit 1Amp will be fine but don't go lower, the N7 would likely burn it out.
Click to expand...
Click to collapse
Do you already have the Nexus 7? If so, can you take a look at the charger and see if rated at 1A output and/or try to charge it with a charger that came with your phone?
I am just curious if it can actually charge with less than 2A. The charger listed in the Play Store outputs 2Amps and I thought most tablets require 2A to charge.
https://play.google.com/store/devic...sMSwyLDExMSwiZGV2aWNlLW5leHVzXzdfY2hhcmdlciJd
Fusion777 said:
FYI I tried a 5v 1a wall charger and my gnex7 said f u wouldn't take the charge. 2a or nothing I say
Sent from my Nexus 7 using xda app-developers app
Click to expand...
Click to collapse
Thanks for verifying.
gsrrr said:
Do you already have the Nexus 7? If so, can you take a look at the charger and see if rated at 1A output and/or try to charge it with a charger that came with your phone?
Thanks for verifying.
Click to expand...
Click to collapse
Still waiting, should only be a couple of days now though...
I know this is something most people never do...but if you read the manual for the Nexus 7 it says you can charge it on a standard USB port with the Nexus 7 in sleep mode (no doubt because the power draw is much less). Standard USB ports are typically .5A...sometimes less. I would say that's the actual minimum. For the fastest charging 2A is what you want though.
The ASUS charger that comes with the N7 is rated at 2A (10W). I tested an old BlackBerry 0.85A (~4W) micoUSB charger and it seemed to work fine and the N7 didn't complain though I didn't do any scientific tests against the charging rates.
The 0.5A (2.5W) chargers probably won't even charge the unit if you're actively using it.
Cheers,
Kermee
Kermee said:
The ASUS charger that comes with the N7 is rated at 2A (10W). I tested an old BlackBerry 0.85A (~4W) micoUSB charger and it seemed to work fine and the N7 didn't complain though I didn't do any scientific tests against the charging rates.
The 0.5A (2.5W) chargers probably won't even charge the unit if you're actively using it.
Cheers,
Kermee
Click to expand...
Click to collapse
Yeah...read my previous post...the manual says you can charge on a standard usb port (0.5A sometimes less) but only if the Nexus 7 is in sleep mode...ie you're not actively using it. If you can't charge it while connected to USB and it's in the sleep state...then your usb port is probably a low power USB port (<0.5A).
For those looking for a good backup battery charger for it...I recommend this one: http://www.amazon.com/gp/product/B005NGKR54/ref=oh_details_o05_s00_i00
works perfectly with my Nexus 7 (just make sure to use the correct USB out port on it as only one of them is 2A)
DealExtreme Charger
Saw this one on DealExtreme, even come with cable:
http://www.dealextreme.com/p/car-ci...-port-for-google-nexus-7-tablet-146751?item=8
Will be ordering will update when arrives. Also they're carrying Nexus 7 Cables in Pink, Green and Orange.
Was using a Sprint micro-USB plus charger (model PVX8823) with attached cable and standard USB port for 2nd device that I was using for my phone. Output is 0.65Amp which isn't sufficient and will slowly drain the N7 battery while in use. ~$35 at Sprint retail store. Wouldn't recommend for obvious reason.
Fortunately, had a spare Motorola SPN5400A 1Amp I bought with some screen protectors from Amazon because it was cheap like ~$5. 1Amp is sufficiently to maintain the charge while in use at near worse case running 3D games like Dead Trigger, Shadowngun, etc. So, 1Amp is minimum threshold.
You need a charger that:
1) Is capable of 2A (1.5A may be sufficient, 1A is a little too low)
2) Shorts D+ and D- together - This rules out most iPad chargers.
If it says it is made for iPod/iPad it will not work without modifications or adapters.
Samsung tablet chargers will work.
If you take an iPad charger, open it up, and short D+ and D- together, it will work.
dkhilo said:
Saw this one on DealExtreme, even come with cable:
Will be ordering will update when arrives. Also they're carrying Nexus 7 Cables in Pink, Green and Orange.
Click to expand...
Click to collapse
Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.
dcpuser said:
Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.
Click to expand...
Click to collapse
Most chargers for android phones will work. I use my HTC charger for ,mine and I bought a car charge that has the standard micro USB connector but also has another USB port so I can charge 2 devices at the same time with 1 charging unit. You droid razor charger will work just fine. You just need to locate a charger that is capable of charging 2 devices at the same time such as this one
http://www.amazon.com/GTMax-Metalic-Vehicle-Charger-Adapter/dp/B005X5L8PI
You'll be good to go with this.
Sent from my Nexus 7 using xda premium
dcpuser said:
Sorry to bump an old thread but any feedback with that charger? I'm looking for one with 2 port to power both my N7 and my droid razr maxx while in car.
Click to expand...
Click to collapse
Check out this oem charger from Sprint. Its a dual port charger with a 2a output and you dont have to worry about buying a knock off charger that may or may not perform as expected. It also can be used as a wall charger. Good price too....
http://www.ebay.com/itm/130712043019?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1459wt_1399
So are any of these confirmed 100% to work? the one a few links back (GTMax) says works with iphone, and I thougth that meant would NOT work with N7. So I am confused on what will work, and I am already on my 2nd Nexus7 being I blew out the USB trying a bunch of differnt chargers for the car.
I would like something that is small and can have multiple USB plugged in, but not a show stopper, just hope to find something on Amazon (Prefer Prime) so I can oder with my case today. Really want to use this in the car more (GPS\GoogleMusic..ect.), but with no power not a great option.
Thanks in Advance,
Drops
dkhilo said:
Saw this one on DealExtreme, even come with cable:
In for the orange so it will be easy to spot if misplaced. Thanks!
Click to expand...
Click to collapse
I have this Griffin Dual USB PowerJolt Car Charger and its been working perfectly on all my devices, Playbook, Blackberry 9900, Samsung Galaxy S3, iPhone 3G, iPad 2 and many others but for some reason, this charger just don't want to work with my Nexus 7. I don't know why its so picky and wondering if you guys could help me identify the problem and preferably with a good working solution.
I tried opening it up and follow the advice from http://www.amazon.com/gp/customer-m...m_ciu_pdp_images_0?ie=UTF8&index=0&isremote=0. Both pins are already been soldered together but the Nexus still isn't charging!!
This makes me wonder where's the USB standard? How are some device / chargers so picky? What did the manufacturers do to prevent charging on other devices or charging through a non compatible charger?
- Charles
You may get flamed for this question because chargers have been discussed a LOT in this particular forum. It seems that none of the discussions show up on the first page at the moment.
Do some searching here for chargers but let me refer you to one of the better threads: http://forum.xda-developers.com/showthread.php?t=1791717
short/y said:
You may get flamed for this question because chargers have been discussed a LOT in this particular forum. It seems that none of the discussions show up on the first page at the moment.
Do some searching here for chargers but let me refer you to one of the better threads: http://forum.xda-developers.com/showthread.php?t=1791717
Click to expand...
Click to collapse
Thanks a lot. I did read up all the posting regarding the USB charging issue on the N7 but I still can't find the answers. I read about people having the Griffin PowerJolt and not able to charge their device.
After downloading the Battery Monitor Widget and plugging to my Griffin PowerJolt (short D+, D-), the device is charging (estimate: 384mA) but still not showing as charging. It shows Discharging and Unplugged. I don't think its the USB cable since the cable works on my PC.
So what causes this issue?
- Charles
Your answer is here http://forum.xda-developers.com/showthread.php?p=29983624#post29983624
It doesn't matter why, just that your Griffin does not do a good job of charging. If you want more either buy oem or any charger designed to work with Samsung, those devices should work better.
Troute said:
Your answer is here http://forum.xda-developers.com/showthread.php?p=29983624#post29983624
It doesn't matter why, just that your Griffin does not do a good job of charging. If you want more either buy oem or any charger designed to work with Samsung, those devices should work better.
Click to expand...
Click to collapse
I guess I still blame on the N7 for being so "picky" since the Griffin USB charger charges ALL devices, including iPad, Playbook, Samsung S3, iPhone and Blackberry but just not N7.
- Charles
chaddeus said:
I guess I still blame on the N7 for being so "picky" since the Griffin USB charger charges ALL devices, including iPad, Playbook, Samsung S3, iPhone and Blackberry but just not N7.
- Charles
Click to expand...
Click to collapse
Yep, the Nexus 7 is picky. No question about it. But your chargert *does* charge your Nexus 7, the Nexus just doesn't indicate it's charging.
Personally, I bought two KMASHI chargers from Amazon. It's a 5V 2A charger and it works great. Charges at greater than 1Ah and the N7 indicates it's charging. Won't charge an iPad but it works for me. The one I bought is http://www.amazon.com/gp/product/B008XQYH1G but it shows as unavailable now. I suspect the other KMASHI chargers will work the same, though.
short/y said:
Yep, the Nexus 7 is picky. No question about it. But your chargert *does* charge your Nexus 7, the Nexus just doesn't indicate it's charging.
Personally, I bought two KMASHI chargers from Amazon. It's a 5V 2A charger and it works great. Charges at greater than 1Ah and the N7 indicates it's charging. Won't charge an iPad but it works for me. The one I bought is http://www.amazon.com/gp/product/B008XQYH1G but it shows as unavailable now. I suspect the other KMASHI chargers will work the same, though.
Click to expand...
Click to collapse
It charges it but its slow. Being rated at 1A, its can only charge at 300mA+ so its rather disappointing plus the charging isn't consistent. Sometimes when I plug in, it will charge, sometimes not so its another disappointment. But I guess I quickly adapt it and don't bother too much now.
I can still use my in car Head Unit with a build in USB port. At least I am getting 400mA+ and it shows as charging so I am ok
- Charles
Ive been recommending this Sprint 2A dual usb charger to everyone. Its a OEM charger so you can expect a high quality product that works as it should and it puts out the required juice to rapidly charge the N7. It also has the added benefit of doubling as a wall charger. Ive had mines for about a week so I can confirm it does indeed work! http://www.ebay.com/itm/130712043019?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649#ht_1459wt_1399
Hey All.. I looked forever to find a solution. The Targus 2A car charger has a small (3") adapter cable that comes with it purportedly for Galaxy Tab. That little cable with the data wires shorted on the device end allows the N7 to be charged from ANY 2A car charger. I'm using the adapter with a Scosche dual 2.1 Amp Car Charger
Adapter picture
Targus Charger
Edit: I just built a usb cable with the data wires shorted on the Nexus end (cut, strip, short micro usb end green and white, remake connections red to red and black to black, insulate splices individually, wrap all in electrical tape or heat shrink for strength and beauty) and it works with all chargers. Took about 20 minutes.
For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)
jtown said:
For cryin' out loud, I'm tired of watching my battery drain while plugged into the supplied USB charger. It's ridiculous. I've never owned a portable device that discharged under normal use when plugged into its supplied AC adapter. If I want to spend 15 hours a day playing Angry Birds, it should be possible when I have a power source which is virtually unlimited. Twice, I've started the day with a full battery, had the device plugged in to the supplied 2 amp charger all day, and had <10% left on the battery when I went to bed. (No, I don't actually play Angry Birds for more than a few minutes at a time but I do use the device a lot.)
Click to expand...
Click to collapse
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life
smartadmin said:
I don't have that problem. You do know that your device will wait till it drops some percentage before it starts charging again. It won't keep it at 100% the whole time... Is meant to conserve your battery life
Click to expand...
Click to collapse
Let's pretend I've got just a little experience with portable devices. The standard is to float between 95 and 100% charge and just call it "charged" once it's bounced off 100% the first time.
Here's a test you can do that requires no time on your part. Set it up to play a long movie while it's plugged in. Look at the charge level after it's been going for a couple of hours. And you don't have to take my word for it. I'm hardly the only person complaining that the supplied charger is not capable of keeping up with the device's power requirements.
If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2
groaner said:
If you are seeing power drop during normal use while plugged in I'd talk to Google. You may have a defective unit. Mine doesn't do that and I regularly see 20+ hour days with normal use unplugged and usually with some video, browsing, games etc.
Take note off when you see the drop, how much you lose over a given amount off time and call Google and see if this is expected. I'm sure they will help. They have been very responsive when I've called.
Sent from my Nexus 10 using Tapatalk 2
Click to expand...
Click to collapse
I will watch like 1 hour of Streaming Vid's and loose like 4-5% while plugged in.
100% brightness causes my device to use more power then what's being supplied from the wall charger, and a few other people have confirmed similar incidents as well.
Max your brightness, and then go play a 3D game, while being plugged into the wall charger, and watch the percentage drop still
My tablet lasts a few days at least before needing a charge. I plug it in over night and it charges to full. I couldn't be more happier with it considering it is not self-sufficient.
Mine drops a few % per hour in use with the stock charger connected. Brightness at 50%, WiFi on, BT off. I'm not going to whine about it, but its the only thing that's not great with this tab.
Sent from my Nexus 10 using XDA Premium HD app
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
5*2= 10W.
Isn't that the same rates that other tabs have, even if they got special chargers?
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
If the kernel on the Nexus doesn't support any higher charger rates, then you cant change anything.
There is a reason why the manufacturers have set 5V as standard - to make it work together with USB.
Battery Specs: Samsung Li-Ion 3.75V 22.75Wh 9000 mah.
So, it's easy. If you had a 1W charger, it would take 22,75 hours to get a fully charged battery.
In theory, it should take 2,75 hours to fully charge the Nexus 10 battery, but we don't turn it off, we use it while charging, it uses background sync and I dont know what the efficiency rating is on the charger or the Nexus.
You know you could feel some heat on the back of the Nexus 10 after some usage?
That's some of the battery's energy that spoils into heat, meaning that there are power losses.
It's normal though, we don't have anything yet on earth that could convert 100% energy from one form to another.
You could compare it to a car, you need a cooler-system to remove the excessive heat from the engine.
Even if your Nexus is far more efficient.
Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
I've read on an Ipad forum that about 10-15 hours charging are normal (the Ipad 4 has a 42,5Wh battery), and their chargers give as much Watt as our Nexus chargers.
One thing is clear, you can't increase the voltage. That would kill your Nexus right away.
My Samsung charger I recieved with my Nexus 10 says 5V out and 2A.
So, the only thing the POGO-charger could raise, is the amount of current.
Even if you had a 10A charger, if the Nexus cant use more than 2A, it wouldn't get anymore amps than 2.
Click to expand...
Click to collapse
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.
Olaeli said:
Why do everyone seems to think that the POGO-charger would be able to charge the Nexus faster?
Click to expand...
Click to collapse
A person that supposedly has said charger mentioned that it seemed to charge faster.
jtown said:
Please do not speculate about how much current can go through the pogo connection. Speculation is worthless and helps nobody. The fact that the included charger only puts out 2 amps probably has to do with limitations of the USB connection. But I'm speculating. See how pointless that is? The fact that one connection is limited to 2 amps doesn't mean all power connections are limited to 2 amps.
And where did I say anything about increasing the voltage? I'm not an idiot and didn't suggest such a stupid thing.
As for temperature, that can easily be monitored during charging and the current can be reduced if it gets too high. You are aware that there is a temperature sensor for the battery, right?
None of which has a darn thing to do with my opinion that it's unacceptable to produce a device that uses more power than it can get from its AC adapter. If there really is no way to run the Nexus 10 at full tilt without supplementing the AC adapter with battery power, Samsung should have addressed that problem before going into production with this unit. This isn't a $150 entry level device. It's the Android flagship.
Click to expand...
Click to collapse
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.
Olaeli said:
Please, you started speculating about a high-current POGO-charger that doesn't exist.
Sure, you didn't mention the voltage, but I ve seen comments about it before, so I just wanted to make it clear.
And I didn't say the temperature was a problem either, just that it lowers the efficiency of the charger and the device.
Samsung maybe didn't know there was a charging problem.
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
And I know, this is supposed to be a flagship, but what everyone forgets is that it's much cheaper than other brands.
I was looking forward to buy a ASUS TF700 with keyboard at almost twice the price as the Nexus 10 before I read about the Nexus.
Even if it doesn't justify the charging problem, you could try to adapt to the circumstances until there's a solution.
When I'm low on battery, I let the device charge and do something else for a change.
Sent from my Nexus 10 using xda app-developers app
Edit: If you look at the pictures of the POGO-charger that's across the internet, the charger is still only 5V, 2A.
Click to expand...
Click to collapse
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.
Olaeli said:
We've seen examples before that manufacturers don't test their products enough.
(ASUS Transformer with encased aluminum body, anyone?)
Click to expand...
Click to collapse
I wonder what all they did test if they somehow managed to miss that...
joe1l said:
I have a nexus 10, nexus7, and a Tf700. I am noticing slightly faster charging on the n10 using the Tf700 ac adapter. The same is true when trying to charge my tf700. The stock samsung n10 ac adapter charges it slower than the asus transformer adapter. The same is true with my nexus 7 adapter. Ive used the n7 adapter to charge my tf700 and it was not as quick a charge. Meanwhile all 3 units are rated for 5v 2amp.
Click to expand...
Click to collapse
Could be possible the N10 charger isn't actually putting out 2A? Might need a multimeter or something to verify for sure though...
I am currently out of town so keep in mind I didn't have a chance to dig too deep but I've given the kernel a quick look through.
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V. The USB connector has the same limits.
I also took a look at the current at the battery to make sure the charger was being detected correctly. My 1A Samsung non-Nexus 10 charger seems to supply ~900ma to the battery which is as much as you should expect out of a 1A charger. My Nexus 10 charger supplies ~1600ma to the battery. This number seems slightly low but at least indicates the charger is detected correctly.
*If* the pogo charger does indeed charge faster, it will likely be because the pogo charger is able to supply some current that is asymptotically closer to 2A. In other words, it will not charger much faster than the USB charger.
On the other hand, the pogo charger will still be nice to have as it will allow simultaneous usage of USB OTG and charging.
Like I said before, I was unable to dig very deep because I'm out of town and browsing sysfs and kernel source on a tablet isn't the best experience. So, the info I found might not be 100% correct.
dalingrin said:
There is no such thing as the "high current pogo charger." The pogo pins accept 2A max and appears to be ~5V.
Click to expand...
Click to collapse
Please show some proof/references for this statement.
Valynor said:
Please show some proof/references for this statement.
Click to expand...
Click to collapse
There are many indicators throughout the kernel but for brevity I'll post what I think is the most concise.
https://github.com/CyanogenMod/andr...ng/arch/arm/mach-exynos/board-manta-battery.c
Line 773-776
Sets the current to 500ma if USB is detected on the pogo or 2A if AC is detected.
Well if you're reading 1600ma using the standard ac adapter that comes with the N10 and possibly closer to 2000ma (say 1900ma) using the pogo, then that is 1/5 faster charging. In terms of time that is quite a saving.
Of course, that is all speculation
USB current limits
I thought I'd post this as information I found while doing a spot of light reading
The current specification of a USB 2.0 port can be a maximum of 1.8A. Within Constraints.
"Battery Charging Specification 1.1: Released in March 2007.
A usb charging port places a termination resistance between D+ and D- to allow the maximum 1.8A", meaning that at this current, there can be no data transmission.
This appears to be increased for USB 3.0 standard.
"Battery Charging Specification 1.2: Released in December 2010.
Several changes and increasing limits including allowing 1.5A on charging ports for unconfigured devices, allowing High Speed communication while having a current up to 1.5A and allowing a maximum current of 5A."
citations come from documents here:
http://www.usb.org/developers/devclass_docs
As POGO pins do not have to follow any specification the only limit is the current the board & charging circuit can handle.
Look at the specs on the wall plug in unit. It's not a charger it's a 5V power supply and the charger is inside the N10. However the charger is setup determines the charging rate. Like mentioned above, it may not matter if you "could" use a 10A at 5V power supply.
I have read countless threads and looked at many chargers and I just can't seem to find a 2a car and a 2a home charger. I just ordered this charger and this cable and it just doesn't work above 700ma. When I use the stock cable I get to 1300mah for a sec and then about 900 steady. This is on both ports. Someone please help me before I lose it! The only one that works at 1500mah is the cable and charger that came with my phone.
Charger
Cable
Thanks in advance.
Well, I can say from repeated certainty that this 6' cable charges at the same rate as the stock cable but is actually nice.
http://www.amazon.com/gp/aw/d/B004GF8TIK/ref=mp_s_a_1?qid=1357187762&sr=8-1&pi=SL75
Also, my Qmadix car charger with dual 2.1A ports does very near stock AC levels when charging 1 device. My results are in the mega 2A car charger thread, but that's a spendy charger.
Sent from my SGH-T889 using Tapatalk 2
farfromovin said:
Well, I can say from repeated certainty that this 6' cable charges at the same rate as the stock cable but is actually nice.
http://www.amazon.com/gp/aw/d/B004GF8TIK/ref=mp_s_a_1?qid=1357187762&sr=8-1&pi=SL75
Sent from my SGH-T889 using Tapatalk 2
Click to expand...
Click to collapse
Thanks!
EDIT:Redundent
As far as home chargers, HP Touchpad charger is the winner easily. IME. Expensive but worth it.
Sent from my SPH-L900 using Tapatalk HD
A quick search on the lowest priced "oem note 2 charger" on ebay got me these, both 2A:
Home
Car
I saw a cable at Best Buy which is pretty nice, it has El Wire that flashes quickly(battery at 0-65%), slow (battery at 66-99%) and turns off when the battery is full. Would that cable be okay to use to charge my phone?
Sent from my SGH-T889 using xda app-developers app
go on the google play store and buy the nexus 7 2A charger. im using that one for my note 2 and its working flawlessly.
I have a cheap gas station 2 port usb car charger rated at 2amp for one port and 1amp for the other. Works great and I think it cost maybe 10 bucks. My phone charges at well over 1300mah in the car using a cheap usb cable I got at walgreens or some ****
Sent from my SPH-L900 using xda premium
I just went to Walgreens also. They have 2 usb port car chargers that charge one port at 2.1amp and the other at 1amp. It was only 10$. They also have a 2.1 amp wall charger as well.
Souai said:
go on the google play store and buy the nexus 7 2A charger. im using that one for my note 2 and its working flawlessly.
Click to expand...
Click to collapse
I'm also looking for 2A replacement... How's the charging time compare to the stock Note 2 charger?
how do you measure the output while the device is charging? Is there an app to test how much juice is coming in real time?
I use a 2A HP Touchpad charger in my living room and a T-Mobile branded 3A dual USB charger in my bedroom (see links below). The T-Mobile charger charges my Note2 from 9% to 100% in less than 2 hours when I only use 1 of the USB ports. I'm not sure what the rate is when both ports are used. I've had this for a couple years and use it to charge (individually and simultaneously) my phones and tablets without any problem.
Close-up of power info (ebay): http://img.auctiva.com/imgdata/8/0/4/4/5/3/webimg/557630115_o.jpg
Description from T-Mobile: http://www.t-mobile.com/shop/AddOns...85a-3de2fcaa1aa4&inCart=True&catCode=22&qty=1
T-Mobile is out of stock, but you can find it on ebay for $6 refurbished or $13 new.
http://www.ebay.com/itm/OEM-Authent...403209?pt=PDA_Accessories&hash=item43b68b7b49
http://www.ebay.com/itm/New-OEM-T-M...191500?pt=PDA_Accessories&hash=item4d07f83f8c
There's also the Blackberry Playbook Folding Blade charger that pushes 1.8A.
HKSpeed said:
how do you measure the output while the device is charging? Is there an app to test how much juice is coming in real time?
I use a 2A HP Touchpad charger in my living room and a T-Mobile branded 3A dual USB charger in my bedroom (see links below). The T-Mobile charger charges my Note2 from 9% to 100% in less than 2 hours when I only use 1 of the USB ports. I'm not sure what the rate is when both ports are used. I've had this for a couple years and use it to charge (individually and simultaneously) my phones and tablets without any problem.
Close-up of power info (ebay): http://img.auctiva.com/imgdata/8/0/4/4/5/3/webimg/557630115_o.jpg
Description from T-Mobile: http://www.t-mobile.com/shop/AddOns...85a-3de2fcaa1aa4&inCart=True&catCode=22&qty=1
T-Mobile is out of stock, but you can find it on ebay for $6 refurbished or $13 new.
http://www.ebay.com/itm/OEM-Authent...403209?pt=PDA_Accessories&hash=item43b68b7b49
http://www.ebay.com/itm/New-OEM-T-M...191500?pt=PDA_Accessories&hash=item4d07f83f8c
There's also the Blackberry Playbook Folding Blade charger that pushes 1.8A.
Click to expand...
Click to collapse
I'm using "Battery Monitor Pro" not sure how accurate it is but most people I ran across seems to use that app.
This is the stock ac charger result
http://forum.xda-developers.com/showpost.php?p=34868700&postcount=121
desairs said:
When I use the stock cable I get to 1300mah for a sec and then about 900 steady. This is on both ports. Someone please help me before I lose it! The only one that works at 1500mah is the cable and charger that came with my phone.
Charger
Cable
Thanks in advance.
Click to expand...
Click to collapse
Lol, I am on my third phone and third charger and they all acting same just within a week. Nonsense. This device has some charging problems.
I just wanted to say best of luck to you.
nmw407 said:
I just went to Walgreens also. They have 2 usb port car chargers that charge one port at 2.1amp and the other at 1amp. It was only 10$. They also have a 2.1 amp wall charger as well.
Click to expand...
Click to collapse
Yep that sounds like the one I have. It has a little pull handle on it too
Sent from my SPH-L900 using xda premium
2 Amps. Extra USB port. Fixed wire (so you don't lose it). Bought it in October and it works awesome.
$12.89. It's the best option out there, IMO (aside from the stock one).
http://www.amazon.com/gp/product/B005AWO8V0/
http://www.amazon.com/gp/product/B004X71HXU/ref=oh_details_o06_s00_i00
I have that one, super slim profile so it looks like its part of your car instead of something plugged into your cigarette lighter. Works like a charm.
Hey Peeps
Anyone else getting slow charging on SM-T810?
Using the bundled charger, I am getting average of only 680mA .... Definitely nothing over 950mA and that is even when screen is off...
Using the same charger and cable on my sony xperia Z3 easily achieve 1400mA ...
Same sort of numbers with other chargers etc... So pretty sure it is device not charger...
Sent from my D6653 using XDA Free mobile app
I just tested and am getting around 1500 mA. That is with my nexus 6 charger.
Bundled charger gives me around 1460 mA.
Are you certain it`s not the app that is wrong as the S2 is new and the app might not have been updated yet, Try the Samsung charging app below, you have to keep pressing the refresh button on the free version.
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free&hl=en
John.
lu99ke said:
Hey Peeps
Anyone else getting slow charging on SM-T810?
Using the bundled charger, I am getting average of only 680mA .... Definitely nothing over 950mA and that is even when screen is off...
Using the same charger and cable on my sony xperia Z3 easily achieve 1400mA ...
Same sort of numbers with other chargers etc... So pretty sure it is device not charger...
Sent from my D6653 using XDA Free mobile app
Click to expand...
Click to collapse
The charging rate can be anything from 300mAh to the maximum the power adapter can output, the tablet will determine the amount of power it will accept, and will jump from fast to slow charge depending on how much more power is needed until it reach 100%.
Thanks guys - obviously does not seen to be wide issue.
I tried the Samsung app above ... Sort of showed similar values ....
I did a charge from 69% to full and it took about 1.5 hours... So would be maybe 5 hours to charge fully?? Unless the device does much quicker charging at very low battery??
I will do a full discharge down to say 5% and then charge from there and see how I go.
Thanks again
Sent from my D6653 using XDA Free mobile app
I would install battery monitor widget from 3c on the play store.
A pretty comprehensive battery app and will give you a full history and time line of charging and discharging cycles.
lu99ke said:
Thanks guys - obviously does not seen to be wide issue.
I tried the Samsung app above ... Sort of showed similar values ....
I did a charge from 69% to full and it took about 1.5 hours... So would be maybe 5 hours to charge fully?? Unless the device does much quicker charging at very low battery??
I will do a full discharge down to say 5% and then charge from there and see how I go.
Thanks again
Sent from my D6653 using XDA Free mobile app
Click to expand...
Click to collapse
Normally it will trickle charge slow once it reach approximate 80%, and is normally fast if the unit is almost power empty.
It's annoying. I've tried both ipad chargers and a 2.4A charger, but it will go to slow charging mode with anything else than the bundled charger.
Apoxx said:
It's annoying. I've tried both ipad chargers and a 2.4A charger, but it will go to slow charging mode with anything else than the bundled charger.
Click to expand...
Click to collapse
Yeah i have found exactly the same!! Must be some sort of Samsung handshake protocol...
There is another thread on this that I have mentions about this, just use a good quality charger, or just go for a Qualcomm QC 2.0 charger from any known brand like htc, aukey, xpower, lots to name, just searh Qualcomm site for a full list.
It won't used the QC2.0, but all should work just like the OEM Samsung one
the ipad charger should be pretty high quality though, so I don't get why it's being so picky.
Apoxx said:
the ipad charger should be pretty high quality though, so I don't get why it's being so picky.
Click to expand...
Click to collapse
If you also followed the tab S thread, it's also been mentioned, Samsung tabs S are also picky, and yes all apple stuff don't work.
Should I rephrase it and say some good quality charger will work, even branded ones like sony may not even work, but my intital testing, most QC 2.0 charger will work.
The issue is that I'm trying to find one charger that will charge both my tab s2 and my iphone 6+ quickly. Any idea how qc chargers fare with iphones? The bundled tab s2 charger only gave my iphone 0.4A (it charges the tablet at 1.5A)
I have both sony and asus chargers with included cables work perfectly with iphones and sony xperia z3 and nexus 7... Hopeless with S2.... But s2 charger works fine with them..
lu99ke said:
I have both sony and asus chargers with included cables work perfectly with iphones and sony xperia z3 and nexus 7... Hopeless with S2.... But s2 charger works fine with them..
Click to expand...
Click to collapse
Odd, my old Nexus 7 2012 charger fast-charges my S2 710 without any issue at all. I had it spare as the N7 died on me (the S2 is its replacement) and was initially wondering myself as I had a few supposedly 2A chargers at home which only slow-charged the S2 (or indeed under Android 5.0.2 said it wasn't charging at all, even though it evidently was, but 5.1.1 has fixed that).
That said this is a charger without fixed cable (but with a decent USB cable) and I know from Raspberry Pi experience that the cable is almost as important as the charger for getting decent charging (ie enough current) to the device on the far end.
I would make sure the USB cable is a decent one intended for charging.
Proper charging USB cables have the shield connected at both ends for use as ground which is why they are notably thicker.
ashyx said:
I would make sure the USB cable is a decent one intended for charging.
Proper charging USB cables have the shield connected at both ends for use as ground which is why they are notably thicker.
Click to expand...
Click to collapse
I agree, a good quality cable is required, as well as the charger itself, I'm using a magnetic cable and a reversible micro USB cable with a OEM Samsung, Aukey and Xpower charger, I don't get the speed of the QC 2.0, but it isn't suppose to as the S2 is not QC 2.0 compatible, but it does charge pretty quick, it also charges my ipod 4, and my nw-ZX2 work without any problems.
I get the "slow charging" message when using the Galaxy Tab S2 bundled charger.
If I use the charger from my Note 4 (Exynos) I get faster charging and no "slow" warning.
Did Samsung bundle it with the slow charger??
I can confirm that samsung did in fact bundle the tab s2 WITHOUT a quick charge usb charger.
I also thought the tab s2 didnt come with quick charge. I have extremely slow charge times but my battery lasts for DAYS... I can fully charge it, put it in airplane mode and check on it after 2 days and be at 98-99% battery.
I also use the quick charge cable AND the quick charge usb adapter that came with my note 5 and the tab still slow charges..
Here the same problem use Samsung charger and cable charge from 20% to 100% in 6 hrs and when use HUAWEI cable with Samsung charger It charged in 2 hrs
I guess Samsung have poor quality cable *-*
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