Powerextra 2 Pcs High Capacity 1500mAh Replacement Sony NP-FW50 Li-ion Battery For Sony Alpha a6300, a6000, a7s, a7, a7s ii, a7s, a5100, a5000, a7r, a7 ii Digital Camera Products are certified, tested by manufacturer to match OEM product Battery Type:Li-ion / Voltage:7.4V / Capacity:1500mAh Includes 2 batteries to power your Sony Alpha 7, DLSR A33, ILCE-7, ILCE-7/B, ILCE-7K/B, ILCE-7R/B, ILCE-7S, NEX-3, NEX-3A Charging at any time will have no effect on the battery Products come with our Powerextra is 30 days money back,and 24 Hours friendly customer service!