Battery

W

walkermarra

Full member
Location
Devon,England
I'm sure this has been asked before but what is the best battery.
RGS with 1200 conversion and high comp pistons turns over but does not fire as soon as I put jump leads from BMW r1150gs starts no problem, so like RGS battery turns over but not enough umph for a spark.
I have Motobatt on now which is only 9 months old and I did have a problem with regulator (now Sorted) but that is fairly crap life for a battery The BM battery has been on for 5 years.
So what's the recomendation chaps?
 
Odyssey PC625.  It's exactly the right height, but slightly smaller than the o/e battery (and much more powerful of course)  I cut a piece of thick closed cell foam to shape so that there was no chance of the battery slipping around in the tray.
 
Duff reg/rect will likely have impaired your battery capacity. AGM type more susceptible than traditional wet lead/acid.  Any decent replacement will do the job. Starting current requirement not particularly onerous, assuming starter motor; relay and cables in good order.
I too use Odyssey, but opinions vary!
 
14.5 is ideal, range 14.3 - 14.7. Allow a minute for reading to settle at 3000rpm with everything else off.
"duff earth" could have sent R/R output high and goosed your AGM battery  :(
 
Mine would start great hot, really poor cold .Its hard to test these sealed batteries as well, I had a local bike shop load test one and gave it a 80% ok, still poor starting and then the local battery distributor said the same. By then I just gave up and spend the $150 on a new battery, that fixed it for a good 6 months. In the end my starter motor needed a good going over 6 months later, if I remember right 2 of the 4 brushes were toast. It all helps.
 
I would go LiFePo4. Way smaller, just 10% of the weight of a gel battery and equall or better starting power (at a higher price though...). Have one in my Zane Formula and that one sucks over 300 A during cranking the engine...
 
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