Just an interesting story I thought I'd put up. Earlier this day, I noticed that i had a 9-volt external DVD player battery. It charges with any DC input from 9 volts to 16(or more) volts. (So i can use my wireless router's 9-volt DC charger to charge it) I first intended in making a cable to connect it to the router, to see if it can run on battery. But i noticed the connector fits into my tablet fine. So out of random curiosity. I connected it. And long behold, the computer recognized that it's on AC power. Though when the battery was removed it powered off. Not enough current.
So i made the cable to connect from the external battery to the computer(from parts i had lying around) and it worked!
The battery is a 9-volt 5.4 amp hour lithium ion battery. We bought it back in 2003 to use it on a portable DVD player, but *never* really used it.
Here's two pictures of it.http://i.imgur.com/2A1Mx.pnghttp://i.imgur.com/k8D7n.jpg
I just needed to turn down the backlight and CPU, otherwise it isnt quite enough voltage/current still. But it works. Who thought it would work with such low voltages?
(though i haven't tested too many other things, like USB power. etc)Admin edit
: Removed 660KB inline image. Please keep them <50KB.
Edit: Gah. I apologize about the file size. I keep forgetting. >_<