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The mkiv Supra Owners Club

Battery charge


lightwave

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Hi all,

 

I think I might have an electrical problem somewhere... maybe someone recognises this...

 

I got the car a month ago now and not long after I got it I noticed that if I didn't drive it once or twice a day the battery lost power and it was getting harder to start.

 

It got to the point where it would hold charge for about 24 hours and then need a jump start. Then it was 12 hours before needing a jump. So if I didn't drive it to charge it up a bit it would die on me.

 

Anyway, I went and got a new heavy duty Bosch battery which was obviously much better. However I didn't use my car this weekend except for 2 trips half a mile up the road to see my Mother. This morning... it wasn't its usual excited self. It was slower turning over. :mad:

 

If this is the same as before, the thing is that it charges fine for a short while but then loses charge quite quickly when not driven. I don't know what could cause that except a dead cell in the battery. But this one's new.

 

I'm a little apprehensive as I'm going away tomorrow afternoon until Sunday... and I fear it won't start when I get back! :(

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The old battery could have been finished, when you got the new battery did you give it a full charge before you put it in the car.

 

New batteries don't always have a full charge.

 

Can't imagine your alarm would be draining the battery, are you using any other high power electrical accessories?

 

A regulator on your car controls how much charge comes from the alternator to top up your battery.

 

So either the regulator or alternator could be at fault!

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Thanks.

 

I didn't give it a charge, the place I got it from stuck it straight in for me. I might give it a full charge tonight. Good thinking Batman!

 

I can't imagine the alarm would be draining that much either. I don't have anything else wired into the car (yet).

 

The alternator must be ok I think, because a drive will charge it up enough to start without an issue. Maybe there's a problem with the... 'regulator'. Thing.

 

Could it be anything else? :innocent:

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