We've always known that Seidio had an Innocell 3500mAh extended battery in the works for the HTC EVO, and while we still don't know the price or release date, we now at least know what it looks like thanks to some new photos the company has just added to its website.
This extended battery has more than twice the capacity of the EVO's stock 1500mAh battery, so it adds considerable bulk to the device (unlike the slim 1750mAh battery) and of course requires that you ditch the phone's original backplate for Seidio's replacement. The new soft-touch back will be bundled with the battery, so the only thing you'll need to worry about is finding compatible accessories and deciding whether all that extra runtime is worth the hump on your EVO's back. More photos below.
With something like this, you can forget all about those 20 tips to improve the EVO's battery life.[Product page]