Like most reasonable phones, changing the Evo's battery is a snap.

The 3.7 V, 1500 mAh rechargeable Li-ion battery weighs in at 31 grams.

That's 23% more capacity than an iPhone 3GS, 15% more than a Droid Incredible, and 7% more than a Nexus One.

Look out! There's a liquid damage indicator on the battery's top edge.