Lithium-ion batteries for Sony have a high energy density, have a short charging period, thanks to the use of STAMINA and ActiFORCE technologies.Characteristics:Type: Li-ion Capacity: 2280 mAh Voltage: 7.2 VCompatible camera models:Sony A7RIII Sony A7R3 Sony A9 Sony A7RM3 Sony A7SIII Sony ILCE-9Compatible chargers:Charger Sony BC-QZ1After purchase, perform 2 charge-discharge cycles of the battery: first fully charge and then discharge the battery. If you do not use the battery for a long time, for example more than 3-6 months, periodically recharge the battery (the optimum battery level is approximately 30%)