Introdução
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The common failure of these batteries is that they drop below the voltage required for the battery charger to recognise that there is a battery connected to the charger. However, I have had two batteries that still would not charge, so I removed the case and had a look. This guide shows what I found and how to repair.
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Once the case is removed, peel back the rubber insulation from the battery cell cover directly under the B+ connection on the circuit board
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Follow along in this video from my channel @Caddyman. Unfortunately the video is too long to be uploaded here. https://youtu.be/g42zHjo_vcs?si=jTWImaCH...
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Conclusão
To reassemble your device, follow these instructions in reverse order.
