Wasabi Power Battery (2-Pack) and Dual Charger for Sony NP-BX1, NP-BX1/M8 Includes 2 batteries and 1 dual USB charger for the Sony NP-BX1 Each battery features Japanese cells, 3.6V, 1600mAh Charge 2 batteries at a time from any USB power source; Input: 5V, 2.1A; Output: 4.2V, 800mA (x2) Batteries work with the Sony original charger; Charger works with the Sony original batteries All items include a 3-year manufacturer warranty Our batteries are long lasting and perfect for your next photo shoot -- 3.6V, 1600mAh -- Higher capacity than the Sony original! Each battery features premium grade A cells for longer battery life with no memory effect. Safe and reliable -- products include over-charge &amp; short circuit protection. Batteries work with the Sony original charger. Chargers work with the Sony original batteries.