We turn our attention to the battery, which sits snug as a bug in its little plastic box, making it annoying to extract.

As it turns out, that's not the only thing holding it down—there's a mess of glue to contend with as well. Removing the battery is even less fun than we feared.

This small accessory doesn't pack light—that 3.67 V, 7.28 Wh, 1986 mAh li-ion cell holds about 9% more juice than the one in the iPhone 6s!