If you're talking about the battery it comes with. It comes with an NP-FV30 which believe me doesn't last long. I bought an NP-FV70 for like $20 and it lasts at least 2.5 times longer. Purchase a longer lasting battery.
The camera comes with a small battery, obviously, and the battery remains onboard when charging. The recording time is quite good with the provided battery. Charging time is approx 3 hours, depending on its depletion.