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Battery question

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MarkCR750:
I left my ignition switched on for about an hour (lights etc off) and found my battery had dropped to 10.2v, I put the multimeter across the terminals and watched it drop about 0.1v per minute, damn I've got a parasitic drain somewhere I thought, I took the battery off and it stated gaining power, put it on charge to 12.5v and it was stable, put it back on the bike switched the ignition on (lights etc off) and it dropped for a few seconds to 11.87v but then remained stable, so is the battery dying or have I got a drain somewhere ?, I'm confused  : ???

hairygit:
With the ignition on, the charging coils of the alternator are energised. And if the engine kill switch is in the "run" position the ignition coils are energised as well with the ignition on. Both of these will drain the battery quite quickly, say 5 hours till it is flat

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MarkCR750:
Thanks, would the 0.1v voltage drop per minute tie in with that or do you think the battery is on its way out too?
Update, I think it was 0.01 per minute not 0.1

hairygit:
Possibly, depends how old it is, whether it's been allowed to go flat while stored etc, but don't write it off just yet. Give it a full charge, and monitor voltage drop over a week or so if it's not being used regularly.

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MarkCR750:
Ok will do cheers

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