2-Pack NP-F770 Single Shop Premium L-Series Battery for Sony Camcorders (4400mAh) Rechargeable Lithium-ion battery 2-pack designed for Handycam camcorders Each battery provides up to 10x hours of continuous recording time 4400mAh storage capacity without the memory effect found in other batteries Built-in microprocessor accurately calculates remaining power within minutes Features 30% more stamina than the NP-F750 rechargeable battery pack