Eventually, we're able to pull out the 3.8 V, 2100 mAh battery.

Just like Apple did with the iPhone 5, LG is utilizing a 3.8 V battery to power the Nexus 4.

Strangely enough, Google doesn't list any specifications for the battery on their product page. We'll have to rely on real-world tests to see what kind of battery life users can expect to achieve.