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Charging Nexus 7 - travel charger

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

Sony RX100 charger works on Nexus 7

Much to my amazement I discovered that the charger for my new Sony RX100 pocket camera also charges the Nexus 7!
I don't know about you, but the assortment of connections, adapters, power cables and chargers can be intimidating to keep straight.
Maybe there are others that would work too, but the accident of plugging in the wrong charger amazed me.

Nexus 7 just uses a standard microUSB cable so any cable from a modern device made by a company that isn't obsessed with proprietary chargers should work.

You're right on, I agree

Pawnty -
It's not that simple. While MicroUSB is indeed standard, not all cables will work on all devices. A friend of mine has a Nexus 7, and it is very picky about what cables and power sources it will charge from. I just got a Sony HX20V and am running into the same problem. It will not charge if I use the iGo AC charger that I have been using for my phones for the last 2 years, my retractable USB-MicroUSB cable, or my AT&T-branded car charger. So far, it has only charged with the cables that came with my Captivate and Galaxy Nexus, plugged into a computer or their corresponding AC adaptor.

USB Charge Boosters

At CES 2013, a little USB device made a few headlines for being able to allow boosted amperage from a PC USB port in order to charge smart phones and many tablets at speeds close to or even faster than their OEM AC charge adapters. It's called ChargeDr, and here are a few info links:
Three things I saw at CES that I'd actually buy:
http://ces.cnet.com/8301-34450_1-57563158/three-things-i-saw-at-ces-that-id-actually-buy/​
ChargeDr lets you charge your tablet from a laptop USB port:
http://ces.cnet.com/8301-34439_1-57...ou-charge-your-tablet-from-a-laptop-usb-port/​
Digital Innovations ChargeDr USB Charge Booster:
http://www.digitalinnovations.com/chargedr-usb-charge-booster.html​
Basically, ChargeDr takes the 5V output of a USB 2.0 (0.5A) or USB 3.0 (0.9A) port and 'requests' a 5V output of up to 2.1A. The power coming from the ChargeDr is then equivalent to an OEM AC charge adapter. Pretty nice for something that will sell for about $30 when it finally ships soon.
There are a few products (Chinese and South Korean) that are already on the market today that either join in on this technology or confuses consumers into thinking their product is the same.
Here's some of what I've seen:
Pisen USB Power Adapter Increases Amperage Converter:
http://www.ylmart.com/pisen-usb-power-aadptor-increases-amperage-converter.html
eBay
Costs between $4 U.S.D. to $5 U.S.D.​
Descriptions for this item usually says something general such as 'increases the amperage to 2000 mAh.' Sounds good, right? Why pay $30 when you can get a device that seems similar for only $5 and usually with free shipping. Wrong. I made a just-to-see purchase of this Pisen device and was totally disappointed. When connected to a PC, it cuts off the USB data pins so that your device does think it's attached to an AC charger. With a Sprint Samsung Galaxy Note II as a test device, however, it took more than 8 hours to go from 18% power to 100% which is about normal when charging the phone through a PC USB port without the Pisen. Weak!
Fastar REUM Adptor:
http://www.ebay.com/itm/quick-charg...ader_Chargers_Sync_Cables&hash=item1e77e2afa9
Costs between $17 U.S.D to $22 U.S.D.​
I am intrigued by another device called the REUM Adptor. It's a South Korean product, and it sounds like it does almost exactly the same as what the ChargeDr claims to do. The REUM is sold on eBay for about $22 U.S.D., but you can also get it through Amazon for $17. This one looks like the real deal, so it'll be my next just-to-see purchase. I have PCs around me all the time, and it's more convenient to charge my smart phone through them than with an AC charger. The Galaxy Note 2's OEM AC charger can fast charge the phone from almost no power to 100% in a little over 3 hours. I'm all for getting similar results through a PC USB port!
So if you're interested in such things, my advice is to stay away from those $5 adapters that only cut off the USB data pins. Wait for the ChargeDr or try the less-expensive REUM.
I hope some of you find this post helpful. Have fun!

I'm intrigued! Please write a review once you get REUM part; I'm especially curious how hot does it get. I mean it's basic EE to use transistor to increase the current (collector current is a multiple of the base current coming from usb port, with an appropriate circuit around it). But implementing it efficiently in such a small package without overheating it could be a challenge.

(REVIEW) Choetech 51w 4 port qualcomm quickcharge 2.0 car charger

The Choetech 4 port usb car charger is a great car charger. It is lightweight, compact and has 4 ports for your tablet and smartphone needs. One of the ports has adaptive fast charging capabilities while the other 3 charge your other devices at a reasonable speed. The other 3 ports also have the capability to detect what phone you have and charge them at there maximum charginging rate. It comes with a qualcomm fast charging usb cable so you dont have to purchase your own or you can use the cable that came with your phone also to fast charge it. As soon as you plug the included usb cable in your phone, the fast charging info in the notification dropdown pops up and lets you know how long it will take to charge your phone to 100%. This car charger has done a great job in doing that compared to my other two car chargers i have and i highly recommend it.
http://www.choetech.com/choetech-multi-4-ports-usb-car-charger-adaptive-fast-charging/

Great product for a family/setting with more than 3 devices on board. Excellent charging response with little to no heat while attached to a Samsung Galaxy Note 4 (quick charge enabled), Motorola Nexus 6 (quick charge enabled), iPad Mini 3 and an Kindle Fire. Saved my vacation!
Now you can get 10% off price for Choetech 51w 4 port qualcomm quickcharge 2.0 car charger
Coupon Code : E4RD2QSD
Expired date : 31st July 2015.

I guess if you have a larger family and you want charging cables all over the place, this would be nice. But I just can't see myself ever using four ports. TOPS would be my wife and I , and I already have a dual port one. Thanks for the review, but I'm going to pass.

Rolander said:
I guess if you have a larger family and you want charging cables all over the place, this would be nice. But I just can't see myself ever using four ports. TOPS would be my wife and I , and I already have a dual port one. Thanks for the review, but I'm going to pass.
Click to expand...
Click to collapse
Someone like me in the Ridesharing industry, two cigarette lighters is not enough! This would be perfect so I can have a charger for myself, iPhone passengers, and Android passengers. Then I could use the other port for my dash cam power!

Edit: Nevermind. Seems the cable is not included.

The QC 2.0 port supplies 15w with 9V and 1.67A which seems to be the the requirement of the Samsung S6 fast charge feature (http://forum.xda-developers.com/showpost.php?p=59794206&postcount=9). I suppose it will enable that feature...
Did you try it on a S6? Is the Fast Charge enabled while connecting the S6 on the QC 2.0 port?
Any concerns about the battery safety?
Thanks

Customer reviews are very good about this product on Amazon. it is mostly compatible with any device. I am going to buy one.

I've just ordered a Aukey quick charger. Won an eBay bid for £5!
http://www.mobilefun.co.uk/aukey-dual-usb-qualcomm-quick-charge-2-0-car-charger-p53610.htm
Sent from my SM-G925F using Tapatalk

I snagged their dual port charger, one QC 2.0 Port charge and one auto detect port charge. http://www.amazon.com/dp/B00YX7Y3G8/

[Review] Tronsmart QC 2.0 Dual & Quad Port Car chargers, 3 Port QC 2.0 Wall Charger

[Review] Tronsmart QC 2.0 Dual & Quad Port Car chargers, 3 Port QC 2.0 Wall Charger
Tronsmart Quick Charge 2.0 Product Reviews
Disclaimer: I was sent these items in exchange for an unbiased review.
I will update this OP with any changes, issues, or other information as it comes up.
Tronsmart 3 Port 42W Quick Charge 2.0 Wall Travel Charger
Overview
I have accumulated a lot of devices that for better or worse need to be charged during the day sometimes all at once. For this reason, I usually carry a small battery pack or multi-port wall charger, along with some cables, adapters, and various other things. Tronsmart made a nice compact wall charger that is ideal for people who travel or on the go. I usually have a mullti-port charger or two at home (Tronsmart Titan 90W 5 port hub on my desk), and another multi-port hub on my nightstand. I always need more ports for one reason or another hence why I like having the most compact, powerful chargers that I can.
What’s in the box
-Tri-port charger
-Documentation
-Micro USB cable
Build & Design
Tronsmart makes one of my favorite looking chargers out there. The edges have a glossy finish to them that leads you into matte colored body. On one side you will see Tronsmart’s logo along with a small LED light that will light up to indicate when you’re charging. If you look at the opposite side the rated inputs/outputs for each port are specified along with a label for which ports have VoltIQ, and QC 2.0. One of the best features of this charger besides its 3 ports is the folding plug which makes it ideal for traveling/on the go.
Charging
The Quick Charge 2.0 port will allow you to charge any compatible QC 2.0 enabled device at a range of voltages/rates depending on how low the battery is. I was able to charge my S7 Edge at 9V/1.67A just like the stock Samsung Adaptive Fast Charger does. Since the S7 Edge is only rated for 9V/1.67A (15.03W) it won’t charge at a faster rate than that no matter how powerful the charger. The other two ports use VoltIQ which is another way of saying it will tell the device to charge at it’s maximum 5V rate up to 2.4A. I tested this with my S7 Edge and was able to get ~5V/1.7A which is the same output as the factory charger at the battery level I tested. Since this charger is rated for 42W which means each port can output its maximum rate simultaneously for maximum charging efficiency with multiple devices.
Charging breakdown by port
QC 2.0: 5V/2A, 9V/2A, 12V/1.5A
2x Standard Port (with VoltIQ): 5V/2.4A each
Summary
This is yet another great charger from Tronsmart (I have a lot of others that were reviewed as well) that has a nice overall design. This charger has a lot to offer in a small package coupled with a solid build that should last for a long time.
Tronsmart 4 Port Quick Charge 2.0 54W Car Charger
Overview
There is always a time that I need to charge things as I mentioned above when outlets are limited. I have a dash camera in my car that occupies one of my power outlets, so I only have 1 other easily accessible place to plug in a charger. When I go on road trips it’s nice to be able to charge my phone as well as my wife’s along with a tablet or two thanks to the wide array of ports offered with this charger.
What’s in the box
-Tronsmart Quad Port 54W Car Charger
- 3.3[ft] micro USB cable
-Documentation
Build & Design
The charger is made from plastic, but it has a nice texture to it just like the tri-port wall charger. I’ve owned and used another Tronsmart car charger (Type-C/Type-A) since December without any issues. It has really come in handy over the past couple of months thanks to its versatility, just like this one will. While this charger is quite large it packs a punch with its 4 ports while still compact for what it offers. It’s not easy to fit a large number of ports in a charger that has to fit in a confined area, but I like the overall way Tronsmart designed this one. I had no issues fitting the charger in my car, and using all of the ports, but that depends on where your outlet is located.
Charging
I tested each of the ports simultaneously with 3 of my phones, and a battery pack to ensure the charger worked as intended. I had no issues charging all 4 devices from the charger making this ideal for anyone that needs to make use of their car charger.
Charging breakdown by port:
Ports 1,2,3: 5V/2.4A (Max)
Port 4 (QC 2.0) Quick charge 5V/2A, 9V/2A , 12V/1.5A (Max)
Summary
This large 4 port charger might not be for everyone, but if you need to power a large amount of devices simultaneously than it’s an ideal choice due to its large power output.
Tronsmart 36W Dual Port Quick Charge 2.0 Car Charger
Overview
This charger is a much more compact, but still versatile dual port QC 2.0 enabled (on both ports) car charger. The overall quality/materials remain the same as the previous 4 port car charger which is a good thing. I switched from my Type-C/Type-A 33W car charger to this one in order to see how it works, and because I can still charge both my S7 Edge and Nexus 6P from it. So far over the past couple days of using this one I haven’t encountered any issues, but I will update the OP if I do.
What’s in the box
-Tronsmart Dual Port 36W Car Charger
- 2x 3.3[ft] 20AWG micro USB cables
-Documentation
Build & Design
The ports are colored (green or blue usually indicate QC 2.0 on Tronsmart chargers) while the back ports are the standard VoltIQ. For this particular one, both ports are green which is indicative of a QC 2.0 charger. There is ample spacing between both ports to accommodate any size cable that I have including: Tronsmart, Choetech, Aukey, Samsung, Google, i-Orange, Asus, Anker and many others. I haven’t found a set of cables that won’t work side-by-side in this charger. Unlike other chargers, this one doesn’t sit flush with the outlet which to me is a good thing. I always find it hard to remove the chargers that don’t protrude slightly, so I appreciate that part of the design.
Charging
Each port is capable of a 18W output which is the maximum you will ever need on a QC 2.0 enabled device. The S7 Edge can only take 15.03W (9V/1.67A), so this charger will fast charge it at the same rate as the Samsung Adaptive Fast Charger. I tested both ports with my multi-meter to ensure they lived up to their ratings.
Charging breakdown by port:
5V/2A, 9V/2A , 12V/1.5A
Summary
I have no issues with the overall design or build of this car charger, plus with the added versatility of a second QC 2.0 port it has a lot to offer. Not all chargers offer their full power output while charging multiple devices, but thankfully this one does. I don’t see any reason not to recommend it because it’s been great.
Tronsmart Micro USB Cable 6 Pack (20AWG)
Overview
I always need more cables because for some reason I either misplace them, or forget to bring them with me. I like how Tronsmart offers a large pack of cables (6 in this set) in varying sizes depending on what you might need. I usually keep the shortest one (1[ft]) in my backpack to go along with an external battery pack I carry with me. The longer ones usually find their way onto my desk or night stand because it’s nice to have the extra length so I can keep all of my devices separate & not clustered together while charging.
What’s in the box
-1[ft] micro USB cable
-2x 3.3[ft] micro USB cables
-3x 6[ft] micro USB cables
Build & Design
These cables have a larger gauge wire (20AWG) which should decrease the resistance thus allowing for less current drop in the longer variants. The connectors work well with any of my 10+ S7E cases, and they are slightly smaller physically than the Samsung one. You won’t have any issues bending these like some higher gauge cables which makes wrapping them up for storage easy.
Charging
I tested each cable length via my multi-meter to see if there was any current/voltage drop while charging my phone. I did not see any measurable drop even for the longer 6[ft] cable, so you should be able to fast charge your phone with any of them without sacrificing cable length.
Summary
I’ve actually owned a pack of these for a while now before receiving this set, and I’ve enjoyed using them. I haven’t had any of them break, fail, or otherwise suffer from flaws during my 5 months using the previous set. I enjoy the large variety of sizes offered because it allows you use a cable that suits your needs rather than one that’s too long/short.

Nice chargers. Quick chargers are very convenient. But where are the product links?

jisddwqs said:
Nice chargers. Quick chargers are very convenient. But where are the product links?
Click to expand...
Click to collapse
They were omitted because XDA likes to close OP's and mark them as spam if you include the product links as I've found out.
Sent from my Nexus 6P using XDA Labs

A comprehensive review, the chargers' design are nice, I like the round edges and corners.
Gold-plated cables seems high-end, I will search and try one of those chargers & cables.

yes it is a pity that XDA doesn't like to paste the links in the topics but what if we would google them and find them ebay or amazon and they are clones or fake.
so when connected in the car with 12V it gives 1.5A to instead of 2.4A?
Is this as good as the ones from Aukey?

Abelu said:
A comprehensive review, the chargers' design are nice, I like the round edges and corners.
Gold-plated cables seems high-end, I will search and try one of those chargers & cables.
Click to expand...
Click to collapse
The cables are all still working great; I have them in various areas to charge my numerous devices, headphones etc.
Liquid Li0n said:
yes it is a pity that XDA doesn't like to paste the links in the topics but what if we would google them and find them ebay or amazon and they are clones or fake.
so when connected in the car with 12V it gives 1.5A to instead of 2.4A?
Is this as good as the ones from Aukey?
Click to expand...
Click to collapse
It is unfortunate, and as much as I would like to post them I can't without having the OP get locked like some others I've written up. Even when I buy products and link them it raises flags for some reason, bht thags neither here nor there
The input rating if the charger is different than the output. I charged a AC 2.0 batter pack at 12V/1.5A which is the highest 12V rate that the charger is rated for. I have a Power Partners 30W single port QC 2.0 charger somewhere that will output somewhere around that in terms of the 12V but I've never tested it.

so when used in a car with 12v sigarette lighter plug it will never get higher then 1.5A or is it only this one? Are there other chargers that get more amps though that 12v port then this one?
The reason I ask is because when my phone is connected to the 12v car charger it does not get charged while using it with max brightness, gps, 4g, 2 or 3 apps at the same time, ...

Liquid Li0n said:
so when used in a car with 12v sigarette lighter plug it will never get higher then 1.5A or is it only this one? Are there other chargers that get more amps though that 12v port then this one?
The reason I ask is because when my phone is connected to the 12v car charger it does not get charged while using it with max brightness, gps, 4g, 2 or 3 apps at the same time, ...
Click to expand...
Click to collapse
As I mentioned the input current will be at 12V from the car, but it can also output at 12V via the QC standard. I can charge 2 phones (1 on each port with multimeters connected) to see he max current I can draw which should be the rated 33W if I recall correctly.

Great info you have here. lol