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New Contributor
Posts: 1
Registered: ‎01-02-2013

battery cannot communicate Canon 7D

I have a 7D about 3 years old now. One battery is original , the other is 6 or 7 months old.

I upgraded to the latest firmware version 2.0 shortly there after (Don't know if there is a relationship?) one battery could not communicate, the other worked fine. I recharged it and it worked one time more then errors after that. the second battery worked for about 3 more days then it failed to communicate as well.



1. Batteries ?

2. Charger issue causing chip in battery to go bad?

3. Camera battery sensor chip gone bad ?


Any suggestions?


Thank you


New Contributor
Posts: 4
Registered: ‎11-14-2012

Re: battery cannot communicate Canon 7D

Try cleaning the contacts on the batteries and in the camera with an eraser.


Hope this helps.



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