Godox CP-80 CP80 CP-80N Compact Power Battery Pack for Nikon SB800 SB900 Compatible with Nikon SB800 SB900 Power: 8 x AA Lr6 Alkaine Batteries,8 x AA Ni-Mh Rechargeable Batteries (Preferred) Note:AA Batteries In Above Image Are Not Included Secure and Reliable with Low-Power and Overheat Indication Excellent for Event and Wedding Photography