Gaspode

For a laugh - we should have said - Set the meter to amps.

RUSS H

A flat battery is 12v, half charged about 12.4v, full 12.8v.

Near 10.5v a cell is knackered.

Car running around 13.5v +


Batteries tend to die very quickly nowadays.

Take a reading fully charged (12.8v), disconect earth lead
overnight and check in the morning. Should be no drop apart
from a cold related one of no more than 0.1v

gaddafi

that was a waste of time

can't find the meter

will do it tomorrow

thanks for the advice

loftust

You may have a drain on your battery if the battery itself and alternator are ok, caused by an alarm, immobiliser or something similar.

To check for this, proceed as follows:

Ensure the car is off.
Set the multimeter to 'A'. If you have different ranges for 'A', use a low one, around 2 should be sufficient.
Disconnect the +ve terminal on the battery.
Connect one multimeter probe to the +ve terminal, the other one to the +ve battery lead.
If you have a reading of more than 0.1 Amps, then you have something sucking the life out of your battery.

HTH

san2000

I had this with the first Omega Pete.

Never did find out what the problem was though and I got rid of it very soon after.

Be interested in what you find out in case it happens to the current one.

gaddafi

will let you know

I will see if it drains overnight

if so, I can't see how it can be anything other than the alarm/immobiliser as I'm sure everything else is off, interior lights etc

the battery is a heavy duty jobby and only two years old with a four year guarantee, so I don't suspect that

gaddafi

right, figures as follows:

these are after the battery has been fully charged using a trickle charger

not running but connected 12.45V
at idle with no accessories on 13.99V
at 2500rpm with no accessories on 14.24V

with all accessories on at idle 13.72V
with all accessories on at 2500rpm 13.80V

battery disconnected 12.45V

I've disconnected the battery now and will check it again in the morning

motogp1

No mushroom cloud in the south then .......i was looking forward to it

Battery if fecked .

Gaspode

Battery seems very low.
In fact as above Fecked.


Get a new one.

gaddafi

I like the diagnoses

The battery is under warranty

And changing the alternator looks a pig of a job

Halfords here I come