The power Grip BGE2 has been designed for the EOS 20D camera , and has an autonomy for up to 2000 clichs. The power Grip BGE2 connects automatically on the second battery once this one is empty. It can also be used with 6 AA batteries. works with 2 BP511 A batteries type. Moreover, the power Grip BGE2 allows a better handling of your EOS 20D.