battery help

[mr_D]

any one know how much discharge is coming out of the battery when the car is off? or is anyone able to check theres for me if they have an amp meter. i need to find out how many amps/miliamps the standard or normal drainage is for the cupra.

my battery is dying every day and i have just check and when the secondary water injection is on im pulling .7 of an amp and when its off im pulling around .2 amp when its off.

also my battery is reading 12v volts which i think it should be more around 13v so think my battery might be naffed


any one have any ideas or anyone able to check for me on there cupra?

 

[olethalb]

i can check when i get home but it's stood for a week, 12v seems fine when off for a few hours and high 13v's when running usually.

 

[mr_D]

when its off a battery should be close to 13v there are 12 plates in a battey each holding 1.1v so would give u 13.2v in a battery. so when its off this is what it should be around anything more than 12.5v is normal/good

 

[mr_D]

oh and cheers for the help mate. it will be much appreciated.

 

[olethalb]

checked this morning and was @ 12.12v

 

[mr_D]

nice. cheers for that mate. do you know how to run an amp meter on it? do you have one? only need to find out the discharge now

 

[olethalb]

yea was going to do it this morning, but ran past it on the way to work and though - ballax, voltage check! so did one quicky, the car is sumpless at the mo tho.

 

[truCido]

Just goto halfords and get them to test your battery with the battery tester lol

 

[mr_D]

i have come to the conclusion my battery is naf now. but need to know if my car is drawing too much power when its off

 

[truCido]

They should be able to test that as well, the battery tester they have in store is pretty good ( as long as you can find someone that can use it lol )

 

[olethalb]

i had one............... some where? haha!

 

[mr_D]

lol. well i checked mine last night and whjen the car is turned off im draining 0.700a for first 10 min then its down to between 0.100-0.300a