The 2280mAh Enduro FZ-100 Lithium-Ion Battery is a rechargeable battery for the Alpha a9, Alpha a7R III, Alpha a7 III and the Sony cameras. Lithium-ion batteries will not suffer from the adverse memory effects that are normally associated with other battery types. Features : Lithium ion Type X rechargeable batteryApprox. capacity: 7.2V (2280mAh)Approx. dimensions (mm): W38.7 x H22.7 x D51.7Approx weight: 50gWARNING: -Do not use mismatched (e.g EL-20 battery in a FZ-100 charger) batteries and chargers-Keep the terminals clean for longer use time-Keep batteries cool and dry for longer held charge-Misuse or taking apart of the battery will result in the warranty being cancelled