External Battery Pack Charger? - Asus Transformer TF700

I'm going on a 13 hour flight as well as will be travelling for 2 weeks around Japan so thought I'd nab one of those usb battery chargers that I can carry around with me for a recharge.
However due to the funky 12V 2A charging requirements all the ones on Amazon and ebay list that it won't work with the asus transformer series.
Anyone know of one that does work?

Portable Power Pack for TF700
sbdags said:
I'm going on a 13 hour flight as well as will be travelling for 2 weeks around Japan so thought I'd nab one of those usb battery chargers that I can carry around with me for a recharge.
However due to the funky 12V 2A charging requirements all the ones on Amazon and ebay list that it won't work with the asus transformer series.
Anyone know of one that does work?
Click to expand...
Click to collapse
I recently had a 9hr + 2hr flight for a cruise and I was looking for the same thing. I ended up buying the Anker Astro3 10000mAh from Amazon
I found that the Infinity will last about 6 to 7 hours watching movies in HD from a microSD card just using the internal battery. The power-pack is good for one full charge of the TF700 battery, so it should keep you going for about 12 hours. When you add in eating, playing with the in-flight entertainment system, and short nap time, you should be all set.
I would recommend looking at a Airline Headphone Adapter as well and bring your own headphones. My flight had the old-style airplane jacks. We did get free earbuds but they were really bad and didn't fit well.
Here is the info from my product review:
I bought this to expand the run-time of a ASUS Transformer Infinity TF700 for a recent cruise trip.
The ASUS Infinity tablet has unique charging requirements. It will charge using USB, but it takes a very long time (about 10 hours). The OEM charger puts out 15V and will charge the tablet fully in about 2 hours, but no power pack supports this voltage. However, the ASUS Infinity also supports charging at 12V, which is available on the Astro3 10000mAh.
To use this with the ASUS Infinity you will need to connect several included connectors together and purchase a USB A FEMALE TO FEMALE adapter.
- Slide the DC power switch to 12v
- Use the included 5.5/2.1mm 2' cable to connect to the DC output port
- Connect the red tip adapter to the other end of the 5.5/2.1mm cable
- Connect the coiled USB cable to the red tip adapter
- Connect the USB A FEMALE TO FEMALE adapter to male USB A end of the coiled USB cable
- Connect the OEM ASUS Infinity USB cable to the other end of the USB A FEMALE TO FEMALE adapter
- Turn on the power pack by pressing on the power button
An alternative to buying a USB A FEMALE TO FEMALE adapter (and using the red tip adapter and USB coiled cable) is to:
- Find and buy a "USB A To DC 5.5/2.1mm Power Supply Extension Cable Cord Female 2.1". It has a DC Interface size: female 5.5*2.1mm and USB Interface: USB 2.0 female. (Note: This is not currently available on Amazon, I found this on eBay)
- This frees up the USB coiled adapter to be used with other USB devices.
The Astro3 10000mAh:
- will charge the ASUS Infinity fully once
- It takes about 2 hours to re-charge with the included DC adapter.
- It shuts itself off once there is no power draw (i.e. when your devices is fully charged)
- It is about the size and weight of a smartphone. As a result, it isn't as portable as it's smaller cousins, but it packs a lot of juice
Overall, this is a solid portable power pack.

Brilliant - exactly what I needed to know. Thank you! :good:

sbdags said:
I'm going on a 13 hour flight as well as will be travelling for 2 weeks around Japan so thought I'd nab one of those usb battery chargers that I can carry around with me for a recharge.
However due to the funky 12V 2A charging requirements all the ones on Amazon and ebay list that it won't work with the asus transformer series.
Anyone know of one that does work?
Click to expand...
Click to collapse
More choices (15000-16000)
http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias=aps&field-keywords=Power Bank 15000mAh
http://www.ebay.com/itm/251162049133?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

buhohitr said:
More choices (15000-16000)
Click to expand...
Click to collapse
The higher powered battery banks are also an option.
The ATC do support 12v, but they would have to be researched to find out what is needed to connect the TF700 to them. In addition, the ATC have yet to be reviewed on Amazon, so you would be taking a chance on the quality of the power pack. Of course, Amazon stands behind their customers so if it didn't work out you could always return it. I usually find it easier to let someone else beta test...
The ebay link is to a power pack that doesn't support 12v, so that would not work.

anyone try one of these? I noticed it in the prime fourms. kinda pricy and heavy at 3lbs but could be nice.
sejat zero-1 http://www.sejats.com/Solar-Charger_c12.htm $90
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

Here is how I made my own.
http://forum.xda-developers.com/showpost.php?p=21930625&postcount=55

Anyone got any other experiences with battery packs? I'm having similar troubles looking for options. I just want to see how much choice I have.

Related

[Q] TF Charging Indicator?

Sorry if this has already been asked and answered - the XDA Search has been down for the past couple of hours and I just want to be sure I'm not missing anything here..
From what I can see in the reviews, the TF does *not* have any sort of charging indicator / LED on it - correct? I read that there will be one on the keyboard dock - but there is not one on the tablet.
So what are you guys doing? Just plugging it in and letting it sit overnight to give it its full charge - and then going by the battery indicator when you turn it on?
I've got my new TF sitting next to me here, and I'm trying to be a good dad to it by charging it up first before using it - but not having any sort of an indicator on it - I have no idea if it's doing anything or not!!!
Screw it - I think I"m gonna unplug it and start futzing it with it! Battery be damned!!
btw - damn this charge cable is SHORT!!
No charging LED that I can see on mine, and yea, I hate this stupid charging cable, guess you can always get a USB extension cable.
pogul said:
Sorry if this has already been asked and answered - the XDA Search has been down for the past couple of hours and I just want to be sure I'm not missing anything here..
From what I can see in the reviews, the TF does *not* have any sort of charging indicator / LED on it - correct? I read that there will be one on the keyboard dock - but there is not one on the tablet.
So what are you guys doing? Just plugging it in and letting it sit overnight to give it its full charge - and then going by the battery indicator when you turn it on?
I've got my new TF sitting next to me here, and I'm trying to be a good dad to it by charging it up first before using it - but not having any sort of an indicator on it - I have no idea if it's doing anything or not!!!
Screw it - I think I"m gonna unplug it and start futzing it with it! Battery be damned!!
btw - damn this charge cable is SHORT!!
Click to expand...
Click to collapse
Monoprice has the USB 3.0 extension cables, but they won't be in stock until tomorrow (their estimate). When they are back in stock, a 6ft extension will run you about $7-$8 shipped.
I plan to order a few cables from Monoprice with a mini hdmi to hdmi cable.
Does it need to be usb 3.0 or will usb 2.0 do the trick ?
dfin13 said:
Monoprice has the USB 3.0 extension cables, but they won't be in stock until tomorrow (their estimate). When they are back in stock, a 6ft extension will run you about $7-$8 shipped.
Click to expand...
Click to collapse
USB 2 cables don't supply enough power.
It will charge, but I think it has to be off and it'd be really slow going.
But usb 2.0 extension cable will work fine with the supplied charger? Also would you not require a usb 2.0 to usb 3.0 converter ?
Asus really overlook the inclusion of an charging indicator. Or, they are trying to make more $$$ on the keyboard/dock?
jake21 said:
But usb 2.0 extension cable will work fine with the supplied charger? Also would you not require a usb 2.0 to usb 3.0 converter ?
Click to expand...
Click to collapse
Has anyone got some definitve experience on USB2 vs USB3 for charging and/or with an extension cable. The whole charging process and adaptor are making me a little nervous in general.
there is no reason to invest in USB 3 gear when all you really need is higher amperage, wich you often get from stand-alone chargers like the one supplied or you can buy in stores (just check that the output is 1000mah or more, 2000 mah is desired for effective charging).
The reason you might want to use a usb 3 PORT (cable makes no diffrence) is that usb 3 deliver more juice then usb 2, but unless it is a dedicated charger port that can supply 2000mah+ charge the port still require you to have the pad either off or stand by and even then charging will take ages.
Consider this, the supplied charger delivers 2000mah on 5v and my HTC charger to my phone has 1000mah @ 5v. Compared to the standard 550mah on a singel non-charger adapted USB port on a computer.
The TF charger output at 15V @ 1.2A with using the supplied USB3.0 cable. If you use a USB2.0 extension cable, it will drop the charging voltage down to 5V. You will need a USB3.0 extension cable
eli.kennedy said:
Has anyone got some definitve experience on USB2 vs USB3 for charging and/or with an extension cable. The whole charging process and adaptor are making me a little nervous in general.
Click to expand...
Click to collapse
There's a thread about this issue here. Several USB 3.0 cables have been found to work, but not for everyone. I have this one that I received today. It charged both the tab and the dock with the wall charger. I've also got a Tripp Lite that's worked for others on the way in the case the other didn't work.
it has to be USB 3.0 extension since the tablet recognizes the extra pin which is what lets it charge at the full rate.
jmkhenka said:
there is no reason to invest in USB 3 gear when all you really need is higher amperage, wich you often get from stand-alone chargers like the one supplied or you can buy in stores (just check that the output is 1000mah or more, 2000 mah is desired for effective charging).
The reason you might want to use a usb 3 PORT (cable makes no diffrence) is that usb 3 deliver more juice then usb 2, but unless it is a dedicated charger port that can supply 2000mah+ charge the port still require you to have the pad either off or stand by and even then charging will take ages.
Consider this, the supplied charger delivers 2000mah on 5v and my HTC charger to my phone has 1000mah @ 5v. Compared to the standard 550mah on a singel non-charger adapted USB port on a computer.
Click to expand...
Click to collapse
Not quite correct. The charger senses a gnd connection on pin 7 of the USB 3.0 connector and delivers 15V @2a to the TF and or Dock. There are only 4 conductors in a USB 2.0 Cable. so the charger only delivers 5V as it does not see the gnd on pin 7. For all the technical details see the thread started by DevCake where the voltages and currents have actually been measured. A 5V 20A charger will not be as good as one with 11-15V at about 2A as the charger is not a constant current charger but a power source for a charge controller ( controlling the current) in the TF.
I appreciate that it is a slightly older thread and not sure if what I'm about to post is already known by TF owners but here goes anyway.
The discussion has moved on to cables but the threqad title is about a charging indicator. I've discovered that the battery icon in the bottom RH corner has a lightning symbol through it when it is being charged.
Sorry if it's old news but I've only had my TF one week and thought other users might not be aware
Really wish they would have put in a fancy multicolor LED somewhere on the housing but we can't win them all. Even the Nook Color had an LED on the cable itself.

[Q] How to charge your TF through the computer ?

As the title says.
I actually thought about this myself.
Lots of lithium single-cell devices (3,6~3,7v) can be charged by USB (5v) but the transformer has 2 cells in series (7,4v) so it needs a higher voltage charger, in this case Asus chose 15v.
Assuming the transformer is able to charge the battery with a very low current power supply, you could in theory connect a step-up converter to the USB port to convert from 5v 500mA to around 15v 100mA, but even if it worked properly it would take well over 30 hours to charge an empty battery. This is how car chargers work, they convert the 12v from the car into 15v to the tablet, but in this case the car is able to deliver as much current as the converter needs.
If you have an USB 3.0 port it is different, I think a standard USB 3 port should be able to source up to 900mA. There are also USB 3.0 ports capable of supplying 1800mA, this would probably allow the DC-DC converter to charge it at around 1/3 of the speed the transformer charger does it.
Because of the need for the converter (and because when I have both the tablet and the PC around I usually also have an AC plug), I ended up not building the converter.
It'll trickle charge but not much else, as stated above USB 3.0 works better, but still the best is the standard wall wart.
Thank you guys :good:
I read somewhere that galaxy tab 10.1 ( I assume it's as same as our TF ) can be charged through pc using a script file ( .sh ) but i'm not sure it'll does the same thing on our TF, Right ?
The galaxy tab probably can be charged via USB because it's battery pack is made of 2 lithium cells in parallel instead of 2 cells in series like the transformer.
When you place 2 cells in series you get twice the voltage and the same Amp/hour rating. In the case of the transformer we have two 3,7v 3300mAh cells in series, this means the battery pack is rated at 7,4v and 3300mA. The samsung has two 3,7v 3500mAh in parallel, this means the samsung battery pack is rated at 3,7v 7000mAh. Because the samsung battery pack is rated at 3,7v it can easily be charged via USB, although very slowly, a 7000mAh battery being charged at 500mA will take more than 14 hours to charge (7000/500 = 14 + losses).
Here is the Galaxy Tab's battery:
[techrepublic.com]
And the Transformer's:
[techrepublic.com]
If you are willing to engage in a little hackery, you can get 12v from the power supply. The danger is that if you mod a usb jack, it could fry your zune if you accidentally plug it in. I think it's the black and yellow wire instead of the black and red.
sent from my transformer
Gee one, I'm going to look that up, if it's possible, I'm doing it. XD
It will probably work, at least there are people on youtube claiming they charge their transformers at 12v, the difference between 12 and 15v is not great and 12v should provide enough headroom to charge the battery pack but if it was me I would still place a step up converter between the transformer and the PC power supply to get 15v instead of 12v.
The reason for this is that it would probably be cheaper for Asus to just use a 12v AC-DC adaptor, they went for a custom 15v one for a reason (I don't know what that reason is), but I would recommend charging at 15v.
If you don't know how to make one of those, just buy a car charger for the transformer on ebay and "steal" the circuit. These car chargers are designed to get between 10 and 16v from the car and converting it in a steady 15v, they also usually are capable of delivering close to the 1200mA rated in the original asus charger.
Oh, and for the "inexperienced adventurers", before applying power always make sure (as in double or triple-check) you don't have wires swapped, I don't know how tolerant these things are to reverse polarity or if the USB data lines (3,3v) of the transformer would tolerate 15v.

10,000 mAh external battery for your TF700 (and other devices)!!

I have a couple Anker Astro 10,000mAh batteries I use with my Xoom (required a similar mod to this one), my Razr, bluetooth headsets and speakers and even a portable fan I use camping. It's an awesome battery with a TON of uses. In fact Anker has several batteries that are very useful, do a search for them on Amazon (and I'm NOT affiliated with them in anyway other than I use several of their products)
It has two USB out ports (5V/2A - one optimized for Samsung, one for iPads, both work with most devices), and a port for charging devices that need 12v or 9v (selectable with a switch on the side, both 2A). The power ratings come from the manufacturer, I haven't personally tested to confirm but based off of charge times I would guess they're correct.
This battery will fully recharge the tablet around 1.5 times (while powering it). And it will also charge the dock/tablet although I haven't tested to what capacity it will charge both while they're connected. My guess would be it will likely charge them fully once. Here's what you need and how to make it work with the TF700 (and TF201 etc...):
Pics of the battery:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
END VIEW
TOP VIEW
Once you have the battery you'll want to contact the seller and tell them you need an extra cable (one comes with the battery along with several adapter tips for netbooks/DVD player/etc and a USB cable with more adapter tips for phones/ipods/etc.) unless you'll only be using it with your Infinity (we'll be destroying the cable here, but you can use the other end to build another adapter for another device!). The seller is awesome and they sent me an extra cable for free. Here's a pic of the cable we're talking about:
ANKER CABLE (comes with the battery)
Here's a pic of the final cable adapter we're making (most of you wont need to read below, you'll get it from the pics alone):
FINAL ADAPTER CABLE
And here's a pic of the final setup:
EVERYTHING CONNECTED
Here's a link to all the pics in high res: http://s60.photobucket.com/albums/h17/tyhurd/Anker Battery Hack/
What you'll need:
1. The Anker Astro battery
2. The Anker battery cable (included with the battery)
3. A USB cable with a female end. I used an extra OTG cable I had.
4. Electric tape
5. Cable heat shrink or other medium to seal it all up (I actually used some epoxy to make it stiff so it would help avoid causing a short from movement because I didn't use solder)
6. Optional soldering gun and solder (I didn't use this I just twisted the wires together, but for more durability you'll probably want this).
What to do:
1. Cut an end off the Anker cable above with however much length you'll want. I did it really short (too short IMO, I would suggest going a bit longer)
2. Cut the female end off the USB cable. Again however much length you'll want.
3. Peel back/cut off some of the outer shielding on the ends of both cables.
4. Connect red to red and black to black - easy... Either solder them together or twist. Be sure to use a little electrical tape to ensure neither wire comes in contact with the other.
5. Seal up your new adapter. If you're using heat shrink be sure to put it on before step 4.
Set the Anker battery to 12V, plug everything together and viola! You can now charge on the go! I travel a lot and did a similar mod to charge my Xoom and it worked great. Now even with HEAVY use you can get a full day out of your devices.
Here's the breakdown on voltage of the original charger vs this charger:
Asus charger: 15V @ 1.2A = 18 watts
Anker charger: 12V @ 2A = 24 watts
I know some of you are thinking why not just set the Anker to 9V as 9V @ 2A is 18 watts, same as the Asus wall charger? It just doesn't provide enough voltage to trigger charging on the tablet. The internal charging circuit will ensure there's no damage to the battery with the higher wattage. This is also the same as using a car charger for the tablet (12V @ 2A)...
This mod has tons of potential for other of devices too... Enjoy!
If you found this helpful click the thanks button below! Thanks!
Very cool. For those interested, I did a quick search on amazon.ca (Canada) and the 10k mAh battery was about $50 - not bad at all.
Do the USB ports on the Anker charge it at all or does it only work via DC out?
RNGuy said:
Very cool. For those interested, I did a quick search on amazon.ca (Canada) and the 10k mAh battery was about $50 - not bad at all.
Do the USB ports on the Anker charge it at all or does it only work via DC out?
Click to expand...
Click to collapse
The one and only drawback I can find is that the battery itself uses a proprietary charger to charge (the smallest hole on the right in the end view pic). It's 12V/1A in, so I'm sure it would be easy to make a car charger for it but no luck charging it via USB... I actually modded a Xoom charger (12v/1.5A) to charge it faster. Not good for the battery I know (but really not too bad) and I also liked that the Xoom's charger wall prongs fold in making it more portable!
just curious ..........if by 'butchering' this way ..WILL IT WORK with Infinity + DOCK ??? as I have my tablet with DOCK !
be ncie to know if anyone can chime in after trying this mod with A DOCK connected
thanks in advance
RNGuy said:
Do the USB ports on the Anker charge it at all or does it only work via DC out?
Click to expand...
Click to collapse
That's a very good question indeed. Any answer ?
I think it can charge it as well as it's possible to charge the TF700 with a regular USB cable plugged in a laptop (for instance), although, this is known to be really slow... (but it may be due to the limited current available through a regular USB port, 500mA.
RNGuy said:
Very cool. For those interested, I did a quick search on amazon.ca (Canada) and the 10k mAh battery was about $50 - not bad at all.
Do the USB ports on the Anker charge it at all or does it only work via DC out?
Click to expand...
Click to collapse
I think I misinterpreted you the first time. I was thinking you were asking if the Anker charged via USB but after reading your question again I see you were asking if the USB on the Anker will charge the tablet and the answer is no. Not enough voltage to trigger charging.
Ausmike said:
just curious ..........if by 'butchering' this way ..WILL IT WORK with Infinity + DOCK ??? as I have my tablet with DOCK !
be ncie to know if anyone can chime in after trying this mod with A DOCK connected
thanks in advance
Click to expand...
Click to collapse
It's not really "butchering", but yes IT WILL WORK with the DOCK... I have the DOCK and can confirm it does work! And why are we YELLING? lol
Howdy folks,
First I can confirm this works wonderfully but I made one change. I was able to accomplish the same results without cutting up any wires. By using the provided adapters you can get output to a male USB. From that point just grabbed a $6 USB gender adapter (male to female) and it works like a charm.
Thank you so much for this suggestion should be a life saver for my coming trip to Japan.
Sent from my Galaxy Nexus using Tapatalk 2
BritCrit said:
Howdy folks,
First I can confirm this works wonderfully but I made one change. I was able to accomplish the same results without cutting up any wires. By using the provided adapters you can get output to a male USB. From that point just grabbed a $6 USB gender adapter (male to female) and it works like a charm.
Thank you so much for this suggestion should be a life saver for my coming trip to Japan.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
What adapter did you use? The only adapters that came with my units (and I have 2) that plug into the DC cable are laptop type, no USB type. Could you be so kind as to post a pic of the setup? Thanks!!
Photos of setup using USB Female gender adapter
Here's a photo of the adapters included with the Anker battery. The beige item is the usb adapter.
You'll want to connect the anker cable -> anker adapter (red tip) -> Anker male USB -> Ugly beige USB adapter -> Asus USB cord
Connected it should look like this:
And proof that it works (set to 12v per instructions above). I've tested it in both tablet and with dock.
Let me know if you have any questions.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
BritCrit said:
Photos of setup using USB Female gender adapter
Here's a photo of the adapters included with the Anker battery. The beige item is the usb adapter.
You'll want to connect the anker cable -> anker adapter (red tip) -> Anker male USB -> Ugly beige USB adapter -> Asus USB cord
Connected it should look like this:
And proof that it works (set to 12v per instructions above). I've tested it in both tablet and with dock.
Let me know if you have any questions.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
Click to expand...
Click to collapse
Got it, WAY easier than making a cable!!! LOL. Thanks!! (I forgot all about the coiled cord. Got these batteries a few months before the Infinity. Much longer setup, but much easier too)
works perfectly
Bought, this battery and did this mod thanks for the info. Great portable charger for tf700.
Hmm, I bought the battery pack, a 5.5x2.1mm DC pigtail and a prime charging cable. When using the prime cable with usb 3.0 extension cable it could charge my infinity on the AC adapter. I used that cable, cut the wires, soldered the red to red and black to black, left the other two untouched. Now when hooked up to my anker charger, it will flash "charging" for a second, then it goes away. The green light on the side of the dock is on, but it is not charged. When plugging directly into the tablet, it does nothing. Wonder if i'm just not getting enough voltage.
Should one of the other wires be tied into the positive as well? I imagine the other two were for data stream.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
NickS VR4 said:
Hmm, I bought the battery pack, a 5.5x2.1mm DC pigtail and a prime charging cable. When using the prime cable with usb 3.0 extension cable it could charge my infinity on the AC adapter. I used that cable, cut the wires, soldered the red to red and black to black, left the other two untouched. Now when hooked up to my anker charger, it will flash "charging" for a second, then it goes away. The green light on the side of the dock is on, but it is not charged. When plugging directly into the tablet, it does nothing. Wonder if i'm just not getting enough voltage.
Should one of the other wires be tied into the positive as well? I imagine the other two were for data stream.
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Click to expand...
Click to collapse
Only need the two wires. Is the switch on the side of the anker set to 12v?
AspenMan said:
Only need the two wires. Is the switch on the side of the anker set to 12v?
Click to expand...
Click to collapse
It is set to 12v, yes. The battery levels were at around 96% for dock and 92% on the tablet. Not sure if it just kept shutting the charging mode off because of that.
Just tried it now, with 91% dock and 86% tablet, and it is charging like it is supposed to. I guess it wont kick on charging mode while battery level are higher.
Another option, also fairly cheaper if you look around, would be to use a usb y splitter cable, such as this one, According to the Amazon page on Anker Astro 10000, Each USB port puts out .5V, thus should be 1V. The Infinity charger outputs 1.2V. Thus, it should charge, just a little slower.
There is another option, but doesn't have as much stored powered, would be, if you can find one, is a Duracell/Xantrex Powersource Mobile 100. I have the Duracell. It's a power converter for a 100W, but has 4000mAh battery storage. It has a AC plug port and two usb ports. I use this at NFL games with my portable TV (7" LCD) that only has a rechargeable battery that only lasts about 2 to 2.5 hours; games are 3 or more hours. Plus, I use it to charge my mobile phone at the game. Unfortunately, the product has been discontinued.
lovekeiiy said:
Another option, also fairly cheaper if you look around, would be to use a usb y splitter cable, such as this one, According to the Amazon page on Anker Astro 10000, Each USB port puts out .5V, thus should be 1V. The Infinity charger outputs 1.2V. Thus, it should charge, just a little slower.
There is another option, but doesn't have as much stored powered, would be, if you can find one, is a Duracell/Xantrex Powersource Mobile 100. I have the Duracell. It's a power converter for a 100W, but has 4000mAh battery storage. It has a AC plug port and two usb ports. I use this at NFL games with my portable TV (7" LCD) that only has a rechargeable battery that only lasts about 2 to 2.5 hours; games are 3 or more hours. Plus, I use it to charge my mobile phone at the game. Unfortunately, the product has been discontinued.
Click to expand...
Click to collapse
Not how electricity works.
Standard USB outputs 5v and 0.5a. Amps can be stacked. Volts cant (at least not that simply). Also if you convert 5v to 15v it would reduce amps by at least 2/3 not accounting for loss.
Sent from my Galaxy Nexus using xda app-developers app
BritCrit said:
Photos of setup using USB Female gender adapter
Here's a photo of the adapters included with the Anker battery. The beige item is the usb adapter.
You'll want to connect the anker cable -> anker adapter (red tip) -> Anker male USB -> Ugly beige USB adapter -> Asus USB cord
Connected it should look like this:
And proof that it works (set to 12v per instructions above). I've tested it in both tablet and with dock.
Let me know if you have any questions.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
Click to expand...
Click to collapse
Hi,
My first post here
I already have astro3. and TF700. Wondering if this is the correct adapter that will work in the final connection?
monoprice dot com /products/product.asp?c_id=103&cp_id=10314&cs_id=1031401&p_id=362&seq=1&format=2
Just wondering if this thread would get more visibility if it were under the "accessories" category. Or is our Infinity community still so small that it doesn't really matter?
BTW, like the setup and I can see how that would be really useful on trips.
Yeah headed Tokyo from Texas tomorrow, I'll let you know how it works out
I agree the accessories thread would be a better place for it
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Dual USB Port Chargers?

I really like my Transformer, but the lack of charging options is an issue.
I'm looking for a dual usb port wall charger (a similar car charger would be great) that will output the 15v needed by the Asus tablets. I don't mind bringing extra cords, but don't want to carry a bunch of wall warts with me when I travel and I have a lot of other USB devices. I'd prefer one without a permanent cord. Anyone found one that works?
The trickle charge options aren't effective since even overnight I only get 20% or so of charge.
What exactly are you trying to do...
The supplied charger charges both dock & Tablet where as the usb will only charge tablet..
Am I missing something?
7495 said:
I really like my Transformer, but the lack of charging options is an issue.
I'm looking for a dual usb port wall charger (a similar car charger would be great) that will output the 15v needed by the Asus tablets. I don't mind bringing extra cords, but don't want to carry a bunch of wall warts with me when I travel and I have a lot of other USB devices. I'd prefer one without a permanent cord. Anyone found one that works?
The trickle charge options aren't effective since even overnight I only get 20% or so of charge.
Click to expand...
Click to collapse
You can safely use the Asus charger to charge all your other devices..
And if you have the tab with dock, you can hook another device to be charged up to the USB port of the dock. As long as the tab is docked and on, the dock USB will output 5V.
I believe He's asking if there are other USB chargers with more than one port that meet the TF700s power needs.
re: dual USB Port Chargers
BinaryW01f said:
I believe He's asking if there are other USB chargers with more than one port that meet the TF700s power needs.
Click to expand...
Click to collapse
That's it exactly. Previously I was able to travel with just a single 4 port USB charger (something like the Skiva PowerFlow QuadFire) which would charge my iPad, phone, camera, and a travel router while only taking up a single wall outlet (which also means only a single plug converter for overseas). I'd love to do the same with the TF700, but would settle for a dual USB port charger (one to port charging the TF700 and one to charge my phone, simultaneously).
While I can charge my phone from the dock's USB port I don't always have the dock with me and it doesn't allow me to maximize untethered usage. Generally I use the dock as an extended battery (assuming I'm not using remote desktop or the card reader) - docking the tablet to charge it, then plugging the dock into the charger while I continue to use the undocked tablet. If the dock supplied power to the USB port without the tablet attached I'd be fine, but no such luck.
Anyway, like many, the goal with the transformer is to minimize the weight and "stuff" I have to carry (in my case a laptop). If I could reduce things further by dropping a dedicated charger for one that served many purposes at the same time it would be great. Something like the Anker Astro3 battery back up but smaller and without the battery would work well.
Maybe, try this one...you could charge your Transformer, because of the DC Output, your Notebook and of course other USB Devices...
I think he mightve wanted something like thiswww.buy.com/prod/apricorn-ausb-y-usb-power-adapter-y-cable-3-28ft/q/loc/101/202641110.html. It doesnt give any tech specs, however it states that it would increase the output power. So I would assume the volts would stay the same, but you might get more amps from usb. Unfortunately, it would just be a faster trickle charge.
Sent from my SPH-L900 using xda app-developers app
7495 said:
I really like my Transformer, but the lack of charging options is an issue.
I'm looking for a dual usb port wall charger (a similar car charger would be great) that will output the 15v needed by the Asus tablets. I don't mind bringing extra cords, but don't want to carry a bunch of wall warts with me when I travel and I have a lot of other USB devices. I'd prefer one without a permanent cord. Anyone found one that works?
The trickle charge options aren't effective since even overnight I only get 20% or so of charge.
Click to expand...
Click to collapse
I got a couple of these from Meritline:
http://www.meritline.com/inland-nss13-wall-tap-surge-protectors---p-73426.aspx
I use my charger that came with the transformer in the main plug and the USB ports for my phone and Kindle. I got two from Meritline and brought a third at Target. You still need the Transformer charger but at least you get two more USB ports.

Aftermarket chargers and sync cables

Has anyone had a positive experience using an aftermarket sync cable or charger? I have bought a few (for other devices) in the past, but several have had issues (flaky touch screen during charging, slow/no charge).
I'm looking for outlet type, USB sync and car charger (long cord!).
Any good reports?
Search Amazon. I have had good experiences buying the cables. My cat seems like them and chews on the cables if I forget to put them away. I don't remember the brand but there is one where the cable casing is a rubber material. I think it's like 2 for 15bucks and they are 6' I think. I've had the best luck with those.
When I tried an aftermarket charger it was for the Prime. It didn't work at all but was also the first aftermarket plug being sold. Over heated and would stop charging a few minutes after plugging it in but continued to heat up. People are giving a few of them 4 star reviews. They may have gotten better now. Other than that it's buy the oem charger. I have not seen an aftermarket usb plug that can deliver the 15v required in these units. If anyone else knows of one I'd probably order one for work.
I bought some off Amazon from a brand/company called "Power +"
They work great, both the car charger and the wall charger. A bit better quality than the factory Asus charger as well.
I was looking into the same myself. I've read many horror stories of aftermarket usb charger/sync cables from Amazon, some seemed to work "great" while down the page I read other users having theirs not fit right/fall apart at the connector.
I could definitely use a longer cable as the stock cable is just too short to use from the socket to the desk, let a lone if I'm under less than ideal places like a lounge/library.
ssnova said:
I could definitely use a longer cable as the stock cable is just too short to use from the socket to the desk, let a lone if I'm under less than ideal places like a lounge/library.
Click to expand...
Click to collapse
You can extend the cable with a USB 3.0 cable. (2.0 doesn't work).
I have this charger - albeit bought through eBay. I did not experience any problems with the charger itself, but the cable frayed where it meets the strain relief on the power brick after a couple of months. After taping up the connection, I am temporally using it to charge up the dock before I can get an OEM charger, but won't let it touch my Infinity itself.
i brought one real crap had to mess with it for it to work
Pwr+ Cables are awesome, They sent me one as a gift for posting a review of the ones I purchased too. kinda nice. I have the OEM cable now and three Pwr+, now I just need more power cubes. (Office Desk, home desk, bedside)
im_electronic said:
Pwr+ Cables are awesome, They sent me one as a gift for posting a review of the ones I purchased too. kinda nice. I have the OEM cable now and three Pwr+, now I just need more power cubes. (Office Desk, home desk, bedside)
Click to expand...
Click to collapse
Where did you post the review?
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Amazon. http://www.amazon.com/review/R3JD8T...e=UTF8&ASIN=B0093OWEOE&linkCode=&nodeID=&tag=
KHOMO 6.5' Pack of two
Nice length - quirky connection but works with charger and USB connection. If they made the connection a little tighter at the tablet it would be perfect.
http://www.amazon.com/gp/product/B007K94I2U/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
Anyone found a aftermarket 15V charger that will work for tablet and keyboard dock?
Mikerla said:
Nice length - quirky connection but works with charger and USB connection. If they made the connection a little tighter at the tablet it would be perfect.
Click to expand...
Click to collapse
I also bought a two pack of these. So far, I have not had any problems out of them. I also got the power+ wall charger and it has worked great.
Chargers don't work
I have bought 2 chargers for my TF700 and neither works. When the first one didn't work I thought it was because is was 2000mA so I bought a 2500mA. Is this not a regular USB charger? What is the voltage?
Thanks
Ólafur
:crying:
The amazon links can't be able for a shipment to France.
Could someone help me to find the Cord Charging Data Sync Cable 3.0 USB to 40 Pin for Asus Eee Pad Transformer TF700T ?
Really appreciate the links here - have a need to buy another cable for my TF700
There is a protocol where the tablet instructs the charger to change to a 15v output. Nonstandard USB.
ken
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I'm currently using this one It works perfectly fine with the stock USB wall adapter and I'm really happy! It's just a damn shame we can't charge the tablet view our PCs...

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