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This question already has an answer here:

I use a Canon 60D with original grip and two genuine batteries. Twice now in the past couple months, after I charge the batteries until they are fully charged and go outside for a photo session, I am getting surprised that I have zero charge in both batteries. I also tried disconnecting the grip and inserting one at a time, but nothing helps.

Am I doing something wrong? Or is it just time to get a new pair of batteries?

marked as duplicate by mattdm, scottbb, Community May 17 '18 at 7:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Since the 60D was released in 2010, those batteries may be up to 8 years old. Given that, I think the above question from just a few days ago will provide your answer. – mattdm May 15 '18 at 15:54
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Batteries store electricity via chemical action. An excess of electrons accumulate on the body of the battery and that segment is connected to the negative ( - ) terminal. In contrast, a deficit of electrons are present on the positive ( + ) terminal. Nature abhors such an imbalance. The natural tendency is for the electrons to migrate and neutralize this imbalance. The battery structure opposes this migration. It cannot be stopped, but it is slowed down by the internal resistance in the battery. After perhaps 100 cycles of charge and discharge, the chemicals that do this deed are so weakened that a sufficient charge can’t occur, plus the internal resistance is now weakened, and migration happens quickly. Time to replace the battery!

  • I see, thanks for the deep explanation! I just ordered a new pair – Ilan Greenberg May 17 '18 at 7:55

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