Apple iPhone Xs Battery Review: Li-Ion 2658 mAh, non-removable (10.13 Wh) The Apple iPhone Xs comes with a Li-Ion 2658 mAh battery that is non-removable. This battery is slightly smaller than its predecessor, the iPhone X, which had a 2716 mAh battery. However, Apple has optimized the battery to improve battery life. Apple iPhone Xs […]