I have a Zeikos grip for my 5D mark ii. I have the original canon battery with about 9k clicks on the battery. I just purchased a new Maxel battery. I shot about 1,600+ images last weekend.
Here are the battery statistics from the info page:
Maxel - 29% shutter count 1050
Canon - 54% 609 shutter count
Why does it use one battery more than the other? Is this a somewhat normal reading? Could you guys post your battery info readings so I can compare?