The SD-8A is designed for use with the SB-800, SB-80DX and SB-27 to shorten flash recycling time and enhance flash capacity. It accepts six 1.5V LR6 (AA size alkaline), 1.2V KR-AA (AA size NiCd), 1.5V FR6 (AA size lithium) or 1.2 AA size Ni-MH batteries.
