Honda-SOHC
SOHC.co.uk Forums => CB500/550 => Topic started by: MIKE550/4 on March 21, 2011, 01:37:43 PM
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hi all again
if a bike has been laid up all winter, battery disconnected, does not using the battery cause it damage
gave it a good top up , fully charged it up but nothing when put back onto bike
any tips apart from buy new battery
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Some of the cheaper chinese batterys, are very fussy and need a constant use or at least a trickle charge , or the power zaps right out of them and when totally drained they quite often dont recover, alot of the chargers these days have a battery recovery mode which can sometimes salvage a severely drained battery,
Pete
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Optimate or similar charger with desulphate function is a well worthwhile invsetment. Other trick if that fails connect it to a good car / bike battery (jump leads pos to pos and neg to neg) then charge the good battery Saved my wifes 250 battery from the skip this winter.
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What you need is a variable output DC voltage supply and wind the volts up till the battery takes some current BUT you need to keep a very close eye on it for at least the first 1 1/2 hours
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Or buy an Optimate (or similar) which is more-or-less what they do.
... but you don't have to watch them :)
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i have one of these optimate chargers, put it on yesterday and red light has stayed on when first connected , which i have read as fully charged
left it charging for about 3-4 hours put back on bike and nothing ?
is 3-4 hours long enough
what exactly is this desulphication ?
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for an optimate the red lights indicate desulphating, orange is charging and green is good to go (at least on mine) It can take a day or more to do it's thing.
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... and it may need more than one cycle. If/when you get a green light, disconnect the battery and reconnect again. You'll probably find it goes staright back into desulphate mode.
Keep going. It may take a while.
Mine has resurrected more than one old battery via this route.
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ok guys cheers
will put it back on