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Cannot Communicate With Battery | Reverting to Type
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Re: Short circuit by screw!!! SOLVED: Canon 7D "will not communicate with battery": Canon EOS 7D / 10D - 90D Talk Forum: Digital Photography Review
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Cannot Communicate With Battery | Reverting to Type
How can I fix a "Cannot communicate with battery" error on Canon 7D? - Photography Stack Exchange
Cannot Communicate With Battery | Reverting to Type
A Canon 7D Mark 1 issue – “Cannot communicate with battery” – Stephen Monro's blog