The Galaxy Note 2 comes with a 2 Amp AC adapter/charger so I was curious to compare the charging capability of the stock charger to other chargers that I already own. I cut open a USB to uUSB cord and used a current meter to see how much 5V current was flowing from the charger into the phone. These results are only good for a Galaxy Note 2. Other phones will draw a different about of current (probably lower). Details of the setup can be found far below.
The conditions were:
Battery level = 48%
Voltage was measured on the cable about four inches from the phone
Only the charger was changed between tests (used the exact same cable/setup for each test).
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The results explain why the Note 2 charges so fast compared to the original Note that I had. Something to keep in mind with dual port chargers...... when I had the two dual port car chargers apart modifying them (the D+ and D- setup so my Note 1 would recognize it as a dedicated charger), I noticed that both chargers used a single 5V regulator and simply ran the power for the two USB ports in parallel. That means that although they say it is a dual 1A charger it could be used as a single 2A charger. I can't say every dual charger is setup that way, but it seems unlikely they would spend the $$ on two different regulator circuits.
Details:
The cable is about three feet long. I cut the cable about four inches from the uUSB connector (where the phone connects). I soldered the ground, data +, and data - wires back together and just left the 5V red wire open so I could insert a current meter (used a Fluke 189 on the 10A mode).
For most people, it is probably best to just buy a car charger that will support 2A for Android. Note that many chargers are setup (their D+ and D- pins) for Apple so you may not get full charging current. That may take a little digging around to see what others have found.
Very interesting! Thanks for posting this as I'd prob would have bought an Iphone car charger. I now know not to, question is what one would be best for matching amperage draw compared to the stock Samsung one(might just order the official, it's cheap).
Thank goodness I bought a lot of those HP touchpad chargers!
I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html
One of you isn't right...
I would love to buy a 2A OEM charger but Samsung hasn't had it on their site for quite some time.
keplenk said:
Thank goodness I bought a lot of those HP touchpad chargers!
Click to expand...
Click to collapse
I cleaned up on those HP Touchpad chargers when they were blowing them out for $5 each. I bought five of them and scattered them all around home and work. Of course the GN2 has such good battery life that I probably won't be needing them much.
mdt73 said:
I find it interesting your numbers are so far off this breakdown:
http://www.arcfn.com/2012/10/a-dozen-usb-chargers-in-lab-apple-is.html One of you isn't right...
Click to expand...
Click to collapse
He tested the maximum current you could get out of each charger. In other words, how much current can you pull until the current limit of the regulator kicks in and the voltage severely drops. I measured how much current the Galaxy Note 2 will pull from each charger. The phone dictates the amount of current pulled as long as that current level is below the maximum current of the charger (he lists the maximum possible current for each charger). If I hooked up the stock Samsung 2A charger to a GS2, it would likely draw less than 1A because it has a smaller battery so it is designed to charge at a lower current. All my results are specific to the Galaxy Note 2.
Here's another crazy data point. I tried 3 different chargers and 4 different USB cables with a killawatt. The stock white cable pulled at least 1.5 more watts than the other cables, which were note1, evo3d and monoprice cables.
At this point I think Samsung increased the wire gauge on the note2 USB cable, to get the resistance down a bit. Hmm this might even be measurable. More stuff to check out tomorrow.
Oh, I tested several 2amp or greater power supplies, and the stock note2 PSU always did slightly better.
Related
Hi,
Sorry if this has been posted before, but i couldnt find anything! I'm basically looking for a car charger to charge my HD2 in the car. I've looked on ebay but they all seem rather cheap? are these ok to use?
Anything with a micro USB plug would do, as long as it has 1000mA output. Motorola has one that will work well with HD2.
Alternatively, you could buy a DC to USB adapter that plugs into the cigarette lighter and then use a micro USB cable to connect your phone. Again, make sure the adapter is rated 1000mA. My advice, stay away from cheap ebay stuff when purchasing power supplies. Not worth risking your phone's battery or worst just to save a few dollars imho.
Example of a result of using cheap chargers in the car ...
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Could i just buy one of these and use the usb to micro usb cable that came with the hd2?
http://www.belkin.com/IWCatProductPage.process?Product_Id=489767
i just ordered one of these 2 amp ones from amazon uk.
http://www.amazon.co.uk/ULTIMATEADDONS-AMP-Car-Charger-Smartphone/dp/B002WT0XP4
A bit dramatic aren't we...
If you want one which should be reliable:
http://www.mobilefun.co.uk/htc-hd2-cc-c200-micro-usb-car-charger-p22081.htm
I would stay away from the cheap ones too. Not because of risks to phone or car (in practice both should be fine), just because they probably wont last as long.
Belkin are a big brand and should be fine (although I have had a belkin mains adapter fail with my touch pro). Yes, It would work with your htc micro usb cable (thats why they put a usb socket on!).
I like that idea, perfect for the car, or when traveling in rentals or other peoples cars.
mofei1 said:
Could i just buy one of these and use the usb to micro usb cable that came with the hd2?
http://www.belkin.com/IWCatProductPage.process?Product_Id=489767
Click to expand...
Click to collapse
On a similar note, wondering if anyone could answer this...Will this charger work fine with the HD2?
http://www.amazon.com/BlackBerry-Fo..._1_4?ie=UTF8&s=wireless&qid=1259891660&sr=8-4
mofei1 said:
Could i just buy one of these and use the usb to micro usb cable that came with the hd2?
http://www.belkin.com/IWCatProductPage.process?Product_Id=489767
Click to expand...
Click to collapse
That is exactly the one I am using! Loving the tiny size, too
Get one now!
Free Man, the BalckBerry charger should work well, too.
Correct me if I am wrong but when you charge the phone via the computer's USB port, as far as i know, the max output you can take is 500mAh. So I guess it is fine even with 500mAh car chargers..
Well, yes it is OK to charge with 500mA, but then how much time have you got? I have tested a few chargers rated 500 mA and got the message that it needs more juice while shooting a video in the car... I guess if time is not an issue and the phone just sits there idle, a 500mA charger will be OK. However, if you use it for navigation it will struggle to keep topping up your battery.
motorola p513
it is ok this car charger? i found that it is an 5V @ 850 mA. If it is not enough i will cancel the order.
Go with a 1A (1000Ma) Output. That is what the original charger is. I used a Blackberry charger at .5A and it would take 24H to charge a dead battery while the phone is turned on.
For those of us going from a Nokia small pin to HD2 with Nokia car chargers already, this looks good. Jumper
there is a kensington car charger that is nice and small too, with a tapered end which is more likely to fit compared to the square end belkin version (see amazon reviews), but the charge output is only 700mA not a 1000mA. See here
I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
mail_e60 said:
I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
Click to expand...
Click to collapse
Ofcourse it can/will.
Do not buy anything cheap/electrical from ebay that comes from China. Even the SD cards are fake, ie branding aswell as size.
mail_e60 said:
I am wondering if anyone has heard of aftermarket (non OEM) chargers causing damage to the Galaxy Tab. I bought a cheap car charger from China (via ebay), and it works but the charger heats up A LOT when it is plugged in.
My concern is the charger causing damage. Any thoughts?
Click to expand...
Click to collapse
As I know car charger about 12v output, our tab charging with 5v = normal usb can offer.
I think the device being heat up and for a period of time could cause damage, pls justify if I am wrong.
Sent from my GT-P7510 using XDA Premium App
yes, some product (aftermarket) had a different power supply rather than oem one, it may potentially supply a different electric input to the device
You want to make sure that it has the same volt/amp output, but even if it does i'd be wary of it heating up too much
I don't think there's much risk to the Tab. The output of the various USB chargers (car, wall wart, etc.) is regulated at 5V, and they're usually rated at half an amp.
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
noguru said:
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
Click to expand...
Click to collapse
The Samsung charger seems to refuse to power other devices, which is mildly annoying. There are plenty of USB devices which can handle more than 500mA, Blackberries for example, and generally speaking chargers won't offer more amperage than the device asks for.
And a lower-amp charger won't be damaged, as it simply won't be able to give more than the rated amperage. It'll just charge your Tab much more slowly
Perhaps it could be considered
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Has a same voltage(it said), using 4pcs AA battery, save us while far away from charging
sent from my 2.3.3|dxkg3 DJGalaxy S2
noguru said:
I don't think there's much risk to the Tab. The output of the various USB chargers (car, wall wart, etc.) is regulated at 5V, and they're usually rated at half an amp.
HOWEVER! The Samsung USB charger is rated to deliver 5V at TWO AMPS (mine is). Obviously, the Tab draws more than the half amp of a normal USB circuit. So, if you plug the Tab into a typical USB circuit, which was designed to deliver half an amp, something bad will happen - like an internal meltdown.
An inadequate charger might be damaged by heat due to excess current flow, but not the tablet.
But what do I know...?
Click to expand...
Click to collapse
A standard PC USB gives 5V at 500mA or 0.5A. Why would a car charger giving the same cause internal meltdown? If you plug the SGT into a PC with the data cable it doesn't suffer internal meltdown either... The SGT definitely has an internal charge controller and overcharge protector so there is really no danger. Unless its a cheap chinese product that either has power surges (unlikely) or incorrect voltage (or extreme current like 5A or so...). To be sure, check the outputs with a multimeter.
Declan79 said:
Perhaps it could be considered
Has a same voltage(it said), using 4pcs AA battery, save us while far away from charging
sent from my 2.3.3|dxkg3 DJGalaxy S2
Click to expand...
Click to collapse
That is a TERRIBLE idea! I suggest you stop immediately! If you're unlucky you could really screw up electronic components in your tab. Unless I am missing something like voltage/current regulation in the battery adapter. Is there a pcb in the battery case or is it just wired directly to the usb? And have you ever actually done the math on the voltage? 1.5V x 4 = 6V or with rechargeables, 1.2 x 4 = 4.8V, not 5V!! Although a cell/battery alone usually won't mind that difference, you are sending electricity through complex electronics, not directly charging the battery. The Tab is expecting 5V exactly and stepping up/down the voltage accordingly (to 3.7 or 7.4V for the internal Li battery).
Tl;dr
@ noguru: check your outputs with a multimeter,
@ Declan79: I suggest you stop using that contraption at once! (for your own good)
Even it only using 4pcs aa battery?
sent from my 2.3.3|dxkg3 DJGalaxy S2
Declan79 said:
Even it only using 4pcs aa battery?
sent from my 2.3.3|dxkg3 DJGalaxy S2
Click to expand...
Click to collapse
If the output is not a stiff 5v, then I would not use it.
I am using a cheap ebay charger, but it does output a good 5v at 2amps. That is the only thing that really matters. It doesnt get too hot. If a charger gets too hot you can bet that it will not have a long life and you hope that when it dies it doesnt take your Gtab with it.
A review for the following products:
Tenergy AC Wall Fast Charger with Qualcomm® Quick Charge™ 2.0 technology
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Powermod Quick Charge 2.0 Certified D/C In-Vehicle Car USB Charger
Both chargers are as fast as advertised over my stock HTC A/C charger that came with the phone and my Rockfish car charger I've been using since my HTC Vivid days.
They both came in nice retail packaging and the Powermod car charger comes with a nice (but short) USB cable. The Tenergy wall charger has an LED on it and it is blue when an non QC 2.0 device is plugged in and turns green when a QC 2.0 compliant device is plugged in. Unfortunately the car charger doesn't have this feature. It has a blue light that rings the device but only indicates that it has power. It doesn't change color when a QC 2.0 compliant device is plugged in.
I have found that both of these chargers will not charge my Asus Transformer TF201. I find this strange because I've used other USB style wall chargers with my Asus data cable (the transformer has a proprietary changing port connector) that worked just fine. Still doing research on that one but I'll not be using these to charge my tablet. I just wanted to point this out as some of these QC manufactures say they are backwards compatible with most devices. YMMV.
I've been using both for about 3 weeks and am very happy with the performance of both units.
Below is data from a series of comparison tests to show how much faster the Qualcomm QC 2.0 chargers are over stock type chargers. The data in the HTC vs. Tenergy charger is an average of 4 charges per device. The HTC vs. Tenergy temperature comparison chart is through one full charge cycle from below 20% to 100%. As you can see the QC 2.0 does charge at a higher temperature. I also took the temperature while charging on QC 2.0 with my DotView case on and at 50% the temperature on the back of the case was 91.4 F. I have taken my phone temperature after heavy gaming and the back has actually gotten hotter just playing games than at any time during the charging cycle with QC2.0. I used a IR handheld thermogun we use at work.
The Powermod and Rockfish data is from my commute to and from work that is on average 30 minutes. There are 4 charge cycles for each devise over a 30 minute period.
Conclusion:
The performance of both units is great compared to stock. Since I can already get a full day worth of battery with between 15 and 20% left after a typical day both these chargers just make life easier. If you have to go somewhere but still have 30 minutes before you leave you can "top off" your battery before leaving if you are low. Example, you realize you have less than 10% battery but have some time before you have to leave. Plug you QC 2.0 charger in and get to at least 50% in that time. I feel much better walking out the door with 50% than 10%. With the car charger you can keep your battery "topped off" between destinations. Time will tell on the longevity of the phone battery and the chargers themselves.
I hope you've found this helpful.
I recommend both of these units.:good:
Images do not work here...
OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!
waynerbbx said:
OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!
Click to expand...
Click to collapse
I'm pretty sure this and this is what OP has in mind, but I could be wrong.
Actually I'm not sure why my pictures are not showing up. I have my pictures set to public. I'll move them and try another location as soon as I get to work.
I see the pictures.........anyone else see them?
Pictures are working now. And holy cow..that's some impressive work Thanks for taking the time to test it all!
Thanks for the input.
I have the Tenergy wall charger and I have been pleased with the results. I will probably buy the same car charger you have next.
Glad everyone seeing the data now. I put this together because of all the questions on QC 2.0 that past few months.
BTW - I do crap like this all the time at work so it really wasn't that much work other than gathering the data. The charts etc took less than an hour to create after I had all the data I wanted.
Cheers mate!
Great data indeed
Sent using Tapatalk
abyssis said:
I'm pretty sure this and this is what OP has in mind, but I could be wrong.
Click to expand...
Click to collapse
Interesting! Thank you for sharing the links!
Thanks for your input M8!
Nice review,thanks!
I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?
Phrostbite said:
I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?
Click to expand...
Click to collapse
The car charger doesn't indicate if it's charging at QC 2.0 specs. Only the wall charger does that. The only way you can tell that the car charger is doing it's QC 2.0 is by the battery level or using an inline USB current meter that will show the charge rate.
Sorry for the confusion, I'll update my review.
(reposting some stuff I wrote in the old joint "Quark" forum, now that we are separate from the Droid Turbo Quark forum.)
timofcourse said:
Has anyone come across other wall Quick chargers that are smaller / lower profile than the motorola one? Looking for something a bit more conducive to traveling with.
Thanks!
Click to expand...
Click to collapse
silverfoxbrazil said:
i would like to have one smaller too
Click to expand...
Click to collapse
I bought two of these and love them:
$13.99
(Quick Charge 2.0)Qualcomm Certified CHOE 18W Adaptive Fast Charger Turbo Charger with Qualcomm Technology
http://www.amazon.com/Qualcomm-Certified-Adaptive-Technology-Motorola/dp/B00QTJZ3D0
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The charger above has a slimmer profile on a power strip than the Motorola "fat" pack (pictured below).
rayjr13 said:
That's interesting because from the photo you posted it looks to be just about as wide as the Moto charger across the face with the prongs. On Delta MD-88 particularly the faces hits the bevels and the blades dont go in all the way to make consistent contact.
But truthfully I forgot that I am holding out looking a QC2.0 true "travel" charger that has international tips. that isn't wide as a bus or at least the tips push the bulk away from the blades. Thankfully they have replaced nearly all those deep recessed outlets that were on B767 which I assume you took to Brazil..
So any ones with travel tips?
The other pictures on Amazon of the one you posted definitely show it look smaller profile on the prong face. So I can see it is in the right size range. now to find an international one.
Click to expand...
Click to collapse
Just telling you it worked for me.
On the way down I used just the charger, as is.
Coming back, I had high quality Brazilian plug adapter still connected to the charger (from using it in Brazil), so I kept that on while charging on the Delta flight back. Didn't see the need to remove the adapter, and possibly lose it.
You can buy one of those and there's your travel tips.
______
Another nice thing about the charger I found it is it automatically detects voltage and adjusts as needed. 100 volts - 240 volts. All the outlets in the charging stands at the Sao Paulo airport were 220 volts, while residential Sao Paulo uses 127 volts. Before I plugged it into the airport charging stand, I went back to the Amazon description just to make sure I wasn't about to burn up my phone or the charger...
The original Samsung Galaxy S6's is super slim and supports fast charge as well. Tested on my XT1225, and my Moto charger on my friend's S6. They both perform exactly the same.
Gand4lf23 said:
The original Samsung Galaxy S6's is super slim and supports fast charge as well. Tested on my XT1225, and my Moto charger on my friend's S6. They both perform exactly the same.
Click to expand...
Click to collapse
Yes, they both use the Qualcomm standard Quick Charge 2.0. Motorola just calls it "Turbo Charging", but it's really just Quick Charge 2.0. Any certified Quick Charge 2.0 (or even 3.0) charger will work. Here's a Qualcomm PDF showing a list of 3.0 and 2.0 devices. Both Samsung Galaxy S6 series and Droid Turbo (Quark, so also Moto Maxx and Moto Turbo) are listed as being Quick Charge 2.0. I already knew that from reviews when I bought the phone, but there it is also from Qualcomm who makes the Snapdragon chipsets.
This year a lot of phones are using the newer Quick Charge 3.0. All the new Quick Charge 3.0 chargers are backwards-compatible with 2.0 and 1.0 phones:
Introducing Quick Charge 3.0: next-generation fast charging technology
https://www.qualcomm.com/news/snapd...e-30-next-generation-fast-charging-technology
So, no worries about buying a 3.0 charger in the future if happen to buy one. Our phone will still charge at 2.0 speeds, but it won't hurt it to be charged with a 3.0 charger.
In the opposite direction, OnePlus is using proprietary chargers for their OnePlus 3. It is NOT any Qualcomm Quick Charge standard, like 2.0 or 3.0. It's something they made up and you have to use their overpriced chargers with that phone. This was after last year, when their laughable so-called "flagship killer" OnePlus 2 phone didn't have Quick Charge nor NFC. This year, they at least included NFC, but they still don't have REAL Quick Charge -- they have their own "Dash Charge", but you use their own cables and adapter ($35, but now on sale for only $33!).
No thanks.
Just ordered this VERY small QuickCharge 2.0 wall charger for my wife to use at work
.
Size: 1.89 x 1.97 x 1.1 in (48 x 50 x 28 mm)
The price is GREAT.
KMASHI USB Quick Charge 2.0 Wall Charger ($5.99)
https://www.amazon.com/gp/product/B010RNBOKE/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
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annson08 said:
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
Click to expand...
Click to collapse
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Michaelmansour1997 said:
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Click to expand...
Click to collapse
No, you don't understand. What you're talking about is INPUT voltage of the wall charger. Take a look at our stock wall charger, it has an OUTPUT voltage of 5V and 9V. Qualcomm quick charge 2.0 enables our phones to be charged on higher voltage (up to 12V). In the case of our s7e, it's only 9V afaik. I'm not talking about ordinary phones, I'm talking about phones with quick charge 2.0. You can even look at our battery info in the settings, it displays that our battery is rated at 9V. Here let me take a screenshot of it.
Spoiler
Sent from my SM-G930F using Tapatalk
It's an interesting topic. The OP is correct about the voltage regarding supported devices, the input voltage is irrelevant, as the output is always going to be transformed to appropriate DC voltage by any supported device. The phone (and all battery powered electronics, such as laptops, watches, etc) can only accept DC, or they would probably explode.
As far as using a 9v battery, I'm skeptical you'd be able to effectively charge a phone with it. Yes it produces 9Vs, but are designed to be used at low amperage, 8 milliamperes (Fast chargers use 2 amps)...moreover, from what I've read they generally only store 400-1000 mah. Considering our phone batteries hold 3600 mah, it would make a single 9v battery fairly useless for charging. If you used several in parallel perhaps.
Or perhaps one of these at 3500 mah... http://www.batterymart.com/p-ulhd6vsc-ultralast-6v-heavy-duty-lantern-battery.html ...but it would have the same problem with being designed for low amperage. If the phone drew the voltage at highers amps, it would heat up the battery and probably lower the total charge it would provide.
I think turbo has the right idea. Alkaline 9v has about 600 mah so to fully charge a dead battery , you would need to parallel about 6 together. And it would probably take awhile. Cheap rechargeables often are between 7 and 8 volts so to be cost efficient would be difficult but the idea in general should work. Good outside the box thinking OP!
I... maybe....
I dunno maybe it's just me but...
...why!?
Just buy a rechargeable battery pack and be done with it. Honestly see no point or reason to want to do this outside of pure intrigue. Nobody is going to carry around several 9v batteries and even less likely to want to carry a lantern battery!