Old battery, new acid.
What's the best way to "refresh" a lead acid battery with new acid? Is it feasible? The old battery takes a charge, but after a few days, the voltage is down to about 12.6 volts, so I suspect it's slightly knackered. Its already been topped up with distilled water, so I suspect the density has dropped too low.
I picked up a non-runner bike that I want to get up and running and use as a farm bike.. hence the question. If it were for a road bike, I'd just use my flexible friend and get a new one.
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