First off, let's take a peek at the Gear Live's battery.

We use a spudger to pry the lightly-adhered battery contact pad from its roost in the rear cover, and then use some sweet tweezers to pull the powerhouse out of the rear panel.

The battery inscription says "1.14 Wh." According to mathemagics and a 300 mAh battery, we conclude this watch runs on a fairly standard 3.8 V design.