The battery charger provides fast, safe and simultaneous charge for up to 2 batteries at a time. It's designed to charge the SSL-JVC50 and SSL-JVC75 IDX Lithium-Ion batteries for JVC camcorders, including GY-HM600/650, GY-HMQ10U and the new GY-HM200 and GY-LS300 camcorders as well as the ProHD DT-X series of field display products. It will also charge the ProHD BN-S8I50 Lithium-Ion battery. This model includes a charge-discharge-charge test mode.