We pull off an interior cover to access the battery connector. If our calculations are correct, the OnePlus One's battery is about to be subtracted.

Our spudger performs the necessary arithmetic, and the 3.8 V, 3100 mAh LiPo battery is ours (and yours) to inspect.

It fares well when compared to its 2800 mAh (Galaxy S5) and 2600 mAh (HTC One M8) rivals.

For those of us who don't read Chinese, this battery sports a maximum charging voltage of 4.35 V, and the following warnings and cautions (paraphrased):

Only use with approved chargers

Keep ventilated while charging

Do not tear down, short circuit, or puncture