Originally posted by Guruji
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Mine had around 7V charge too. When I open the cell, I see only 3 cell are good, the other one shorted because of heavy corrotion...

Originally posted by Guruji
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YouTube - Swap Charging front and back battery
I use relay with 4 contact point, FRM3-4B5. I use toggle switch but should be easy to add 555 control, just being lazy
.If I try it again, I would use latest circuit and add ungounded water connect to load positive.
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. How much current needed to be as bright as it normally do?



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