Kastar Battery 2 Pack + Charger for Sony NP-FV30 NP-FV40 NP-FV50 & Sony Handycam HDR-CX380 430V 900 580V 760V HDR-PJ540 650V HDR-PV710V 790V 810 HDR-TD30V FDR-AX100 DCR-SR DCR-SX HDR-CX HDR-XR Series

Customers find the batteries work well with Sony camcorders and appreciate their good quality and low cost. The product fits perfectly and comes with two extra batteries, and one customer notes the charger includes both wall and car power options. Battery life and compatibility receive mixed reviews - while some say they hold a great charge, others report they last less than 20 minutes, and several customers mention compatibility issues with their Sony devices.