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Bike battery FUBAR
40inches - 11/2/12 at 05:39 PM

The bike battery on the MK has gone flat, no life what so ever, my fault as I haven't been in garage since just before Christmas.
It doesn't light up the bike battery charger,so that's a non starter, but the car charger does, and starts to charge it.
Do I let the car charger put some charge in,and then try the bike charger again,let the car charger do it's worst or bin the battery?


carlknight1982 - 11/2/12 at 05:56 PM

for the cost of a bike battery id slap a new one on in the summer


britishtrident - 11/2/12 at 06:08 PM

Depends a lot on the battery chemistry a lot batteries with "enhanced" lead acid chemistry are almost impossible to bring back from a no-charge state. You might get it back to life with hi-tech chargers that jolts the battery with 21v pulses at the start of the charge cycle.

If it is a conventional battery just try a long charege (36+ hours) at the lowest possible current setting.
Personally I would ditch the battery even if you get it back to life the charge capacity will havebeen severly reduced bad enough on a car battery but a disaster on a bike battery.

Every time you take more than 1/3 charge out of a battery it reduces the total charge capacity of the battery when recharged.
Also when a battery is discharge to any degree and left without immediate recharging then there will be some % damage to the battery charge storage capacity


40inches - 11/2/12 at 06:25 PM

Thanks chaps, all good advice. Heave it in the bin I think, the annoying thing is, it's never been used in anger.

Another annoying thing is, it's been hooked up to an Oxford conditioning charger since I got it, I ran the engine to empty the float bowls beginning of December and forgot to reconnect. Doh!

[Edited on 11-2-12 by 40inches]

[Edited on 11-2-12 by 40inches]


Dangle_kt - 11/2/12 at 10:25 PM

what a pain!

At least you know with a bit of notice, so you are't forced to pay rip off halfords prices like I was when a few days before a track day I went to check it over.

Bet you wont forget again though


40inches - 12/2/12 at 10:41 AM

quote:
Originally posted by Dangle_kt
what a pain!

At least you know with a bit of notice, so you are't forced to pay rip off halfords prices like I was when a few days before a track day I went to check it over.

Bet you wont forget again though


Too bl**dy right I won't


owelly - 12/2/12 at 11:50 AM

I bought a Varta bike battery from Halfords. £39, thanks to Halfords trade card!


britishtrident - 12/2/12 at 12:12 PM

Only reason that looks a good buy is that Halfords prices are truly outrageous to start with.


owelly - 12/2/12 at 12:19 PM

Ok, you try and get the same battery for a better price even if it wasn't on a Sunday afternoon......


britishtrident - 12/2/12 at 01:34 PM

Use a tapered or expanding reamer ----- do an eBay search.


40inches - 12/2/12 at 04:09 PM

quote:
Originally posted by britishtrident
Use a tapered or expanding reamer ----- do an eBay search.


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