Plugged in the Canon charger for my LPE6 batteries as I have many times before. I charged the lower level of the two batteries (21%) and as usual the indicator light blinked once per second. After a few seconds it started to blink very rapidly and at a constant rate. Took it off the charger and popped it back on....same thing.
Popped other battery on and it worked normally.
Both are original Canon batteries. The grip is a Zeikos. Noticed that one battery drains much more quickly than the other. Is this normal in a gripped 7D? Today one battery was at 21% and the other at 63%. Should they be staying closer together?
Bad battery?

