DSTE 2x NP-FM500H Replacement Li-ion Battery for Sony Alpha SLT A58 A57 A65 A77 A99 A77V A77II A350 A450 A500 A550 A700 A850 A900 Alpha a99 II CLM-V55 DSLR Camera as NP-FM500 Battery Type : Li-ion Battery Capacity : 17Wh/2300mAh Output Voltage : DC 8.4V (max)/ DC 7.2V (mean) Info Function for Life Indication High Capacity for Stamina Full coded version, show battery level in camera screen. No memory effect, can be charged or dischargered at anytime. Perform as good or better than the top branded batteries on the market.