Flat Battery

chaslam07 · Renault 5 Driver Joined: 22 Aug 2011 Karma :

Hi, quick question i have a 1998 gsxr srad and it has a flat battery, tried bump starting to no avail, i dont have a charger but might be able to get hold of a car one, presume this will be ok to use ?

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

Almost certainly not, except for a very short while (minutes). How long has it been flat?
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Redoko · World Chat Champion Joined: 04 Nov 2009 Karma :

Happened my 99' SRAD.

In the end I jumped it off my dad's jag. Left it idling for about half hour. Every time I used it after that, up until selling, started a treat.
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Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

A car charger will be fine. Just don't leave it on charge overnight. Keep an eye on the charge level and as soon as it drops to near zero you should be good to go Thumbs Up

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

Car chargers are NOT ok to use with many bike batteries. You can cause serious damage or even an explosion. I've had batteries which had the sides bulging outwards from over-charging.
Bike chargers limit the charging current to a couple of amps, some car chargers have this feature but many don't. If you have a trickle charger and a very flat battery, sometimes the trickle charger won't start charging and this is when a quick blast on a car charger will bring the voltage up enough so the trickle charger will start working. Otherwise, you're risking damage to the battery.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy

Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

carman · L Plate Warrior Joined: 23 Jul 2010 Karma :

used a car charger for years ,but you have to put a car fog /stop /side light bulb in series between the negative clips ,then onto the batt. this gives you about a 1/2 amp going into the battery

orac · World Chat Champion Joined: 25 Sep 2011 Karma :

some i know charger a runner with a car charger, cooked the battery, reg/rec and alternator.

so if you are going to use a car charger remove the battery from the bike first
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Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

carman · L Plate Warrior Joined: 23 Jul 2010 Karma :

forgot to add that to my reply ,i always disconnect the batt whilst charging,had no probs using car charger,as long as you reduce the amps ,with a test or inspection light connected in series between batt and charger

Howling TerrorOutOfOffice · Super Spammer Joined: 05 Dec 2008 Karma :

Seeing as chargers for bikes are very affordable and bike batteries will always need charging I'd get the proper tool for the job.
Makes sense in the long run.

After 4yrs my £9 wallwart is still working fine. (Aldi/Lidl)
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