Panasonic lithium-ion Battery
specification
Model: NCR20700B
Typical capacity: 4250mAh
Minimum capacity: 4000mAh
Nominal voltage: 3.6V
Continuous Discharging Current(MAX): 12A
Life cycle: more than 300 time
weight: 63g
dimensions: 20.3mm ｘ 70.1mm
Panasonic
Specification sheet: Download here