Have just bought a Sony BC-M50 V-mount Ni-MH and LI-ON Lithium-iom dual battery charger. What V mount batteries can I charge with this? Is there a limitation on the wattage of the battery I can charge? Am now looking for suitable batteries to power an Ikan IFD576-S 2-Point Light Kit with Sony V-Mount Battery holders. Need about 2 hours use per charge.