Features: Battery Grip: Pro Battery Grip for Canon EOS 20D/30D/40D/50D D-SLR Hold 6 AA batteries or 2 BP-511 Li-ion batteries Vertical shutter with half-press function Doubling the battery capacity of...
AdvantagesGreat performance and durability, reliable.
DisadvantagesExpensive from new.
AdvantagesCharges our batteries well
Disadvantagesfiddly to place batteries in