"tidla", if your leisure battry is sealed, the recovery strategy is more difficult, but do-able. Repeatedly charge and discharge it slowly and it should eventually recover most of its original capacity.
If it is wet lead-acid, recovery is quicker and more certain, but very messy and you may not want to bother.
After idle storage, it will have sulphated up, with the internal plates coated in insoluble (almost!) lead sulphate. A technique that I have used in the past, when I was younger and could be bothered with such things, was to drain out all of the electrolye - SULPHURIC ACID, SO TREAT WITH RESPECT OR IT WILL EAT YOU! - and keep it somewhere safe and do not allow anyone to touch it.
Next, refill it with plain water; tap water will do, as it won't be in there all that long and then charge it again as if it were a normal battery.
It will hold a charge. Not much of one, but still a charge. When you are bored with waiting, empty out the water, which by now sould have released some of the lead sulphate, and dispose of it responsibly.
Repeat, and repeat and repeat until you have restored it to reasonable health or until you die, whichever comes sooner!
Ron.
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Topic: Energy storage (Read 1987 times)