This spare Sony NP-BX1 X-Series Rechargeable Battery Pack provides high capacity battery power for Sony RX series and ZV-1 compact cameras. Li-ion InfoLITHIUM battery for Sony's Cyber-shot DSC-RX100 series. The Sony NP-BX1 Rechargeable Battery is a spare or replacement lithium type X rechargeable battery for your Sony RX1, RX1R, RX1R II, RX100, RX100 II, RX100 III, RX100 IV, RX100 V, RX100 VI, HX400, HX300, HX60, HX50, WX300, WX350, WX500, HX90, RX90V, HX95, AS15 cameras. The Sony NP-BX1 has a capacity of 3.6 V, 1240 mAh.