Digital Foci Picture Porter A02-005 35 Polymer Li-Ion Battery 3.7V 2800mAh 3.7V 2800mAh battery capacity 4 hours of continuous video playback or up to 3 hours of memory card copy on a full charge. Easy on-the-go access to battery compartment through battery door on the front of the Picture Porter 35. Polymer Li-Ion battery technology does not have memory-effect