This is the next-gen iPhone’s new battery: a 3.8V 1440mAH lithium-ion pack with a watts-per-hour measurement of 5.45 wHR. Compared to the iPhone 4S’s 1430mAH battery — which runs at 3.7V and has a watts-per-hour measurement of 5.3 — this battery has at least 10% more capacity, making it perfectly possible (and very, very likely) that the iPhone 5 will finally get LTE. It’s also thinner, seemingly confirming that the next iPhone will be the thinnest one yet.
Source: 9to5Mac