R80 battery not charging
Hi folks,
A strange thing - the battery red light on the instrument panel goes out with increased revs, suggesting the charging system is working fine, yet a multimeter reading stays at 12.75 V when it should be going up to around 13.5 V.
Could this be because the gel battery is on its way out? It's 4 years old and recently plummeted to 12 V. I had left the bike unused for 3mths, battery disconnected, having not used it much the preceding 2 mths.
I got it charged up to 12.75 V, but as mentioned above, it doesn't appear to be recharging via the alternator.
I have read that once gel batteries have been allowed to go dead, they're hard to resurrect.
Thoughts?
If so, can I stick any old 12 V moto battery in it, assuming it fits (I'm currently in Mexico), or does it have to be BMW?
Cheers,
Bob
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