[icecool742]

Originally Posted by webdude12

I have an extended / travel battery idea.

Imagine this:

A small box about the footprint of our Evo. This box holds 2 of the regular batteries (think side by side flat). It has a normal USB Port on it and a micro USB Port. And maybe a few indicator LEDs. We can then hook this small box to a USB Charger, a Laptop, etc to charge the batteries inside.

Then when our Evo needs more juice, we have one of two options. Either pull out one of the batteries from this small box, or plug via USB cable into this box to charge the battery in our phone from the two batteries on board.

Does anyone know of something like this? Is this something people would be interested in buying if could be purchased cheap enough... Maybe this is something when can petition Seidio to make?

yo. I came across this. looks nice.. check it out

Review: Splash Intense 5400mAh external battery pack for HTC EVO 4G



and theres few more

Amazon.com: New Trent ultra high IMP500 5000 mAh External Battery Pack for 3G iPad, iPhone 4 4G, iPhone 3G 3GS, iPod Touch (1G 2G 3G), Motorola Droid , HTC Android Phones, Blackberry (curve, bold, tour, storm): Gateway



maybe just get extended battery instead ?