[Asus Transformer TF700] AspenMan:
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:

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!