For use with compatible Sony cameras, this SB-U50 Sony BP-U Lithium-Ion Battery from IDX System Technology offers an alternative power source while in the field with an integrated USB-A output port and 48Wh capacity. Thanks to its updated software, the battery has improved accuracy in your camera's viewfinder indicator for better power monitoring. One D-Tap output and one USB-A port can power additional camera accessories or charge the battery once depleted. A 4-stage LED indicator displays the total remaining battery, while overcharge, overdischarge, and overcurrent protections maintain its internal circuitry.