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FAQ-0013 Why is the battery percentage suddenly dropping?

Battery voltage drops occur when the internal resistance of the battery is too high.

The value of the internal resistance depend on several factors :

  •  The temperature (the internal resistance is higher in colder weather)
  •  The number of cycles (In other words the number of discharges and charges)
  •  The age of the battery
  •  The balance between cells voltage

It's also very important to store your batteries at the right voltage. You can see on the attached article, a document that shows how the storing voltage affects the battery capacity.

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