The lead on the battery plates slowly changes into lead sulphate as the battery discharges. This process is reversed when the battery is recharged, but if the lead sulphate is allowed to stay on the plates for some time, it hardens in a crystal form that cannot be recharged.
If the battery is bulging on the sides then I believe its called being sulphated and its toast. If you want to try and recharge it I think your best plan is to hit it with about a 10 amp charge for a short while, not overcharging it. But as a sailor/boater and a guy who has really dealt with batteries in everyday life a lot... The best place to call is Polar Battery on Boundary Road. I've had more than one battery issue where the guy brings out his fancy little machine and tells me in no uncertain terms, your battery is fine I won't sell you one, just go home and charge the ($($(#(# out of it and it will be fine. And he could have sold me a $75 battery.
There number is 294-1891. Or just take it over there. They have great prices to begin with but they'll probably even give you a BC Sport Bike Discount if your nice.
10amps on the thin plates of a motorcycle battery is not a good idea. for any length of time. do as CBR sudgested and put it on a trickle charger. 1.5 to 2amps is a good trickle rate. will take awhile to fuly charge but won't cause any plate damage.
I went to the local Canuck Rubber and purchased a 50 $ charger. (Little overkill but I figured I could use it for a while). I put the battery through a deep 2 amp charge for probably 3 days. I reinstalled the battery and the lights and ignition worked again however it didnt seem to have enough juice to start the bike. After each attempt, the battery died again even further. I do actually see a small buldge on the battery so I believe it is toast.
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