Buy from Amazon.com : http://fave.co/1bdj7QZ
Godox PB820 High Quality External Flash Power Battery Pack for Canon 580EX2 Nikon SB900 Sony
Product Description :
Battery Pack Ni-MH battery 96V 2000mAH for Canon 580EX II 550EX 540EZ Speedlight
Battery Charging Time about 2 hours
Flash Charging Time about 1 second full power
Flash Time about 250-320 times full power
Dimension 150 x 104 x 44 mm
