I recently replaced the Lithium Ion cells in an ebike battery for one of our empowered riders. But unfortunately after a few months it made its way back to me. It had been working great but recently even though the charger showed it as charged it would not last more than a few minutes before seemingly being flat.
I was curious as the cells were only a few weeks old and should not be draining that fast. Maybe a bad cell was in order?
Anyway I quickly opened it up, but right away I could see the issue..
Water
But after a bit or clean up with Isopropyl alcohol and some new taps welded on its looking and working a lot better
Interestingly this battery case did not have any sealant and relied on a very tight fit of the lid to case. but it was stamped with ( DO NOT GET Wet) so i think it is really only designed for dry weather riding. Most new batteries are much better at keeping the water out. Hopefully this one was saved just in time.
Empowered People 
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