Knackered battery?

[graham k]

Hi all 

wondering if anyone can help?

first thing in the mornings now since temperature is chilling down a bit my x3 is not turning over as fast as it should ( but still starts)

i put it on charge yesterday and showed fully charged on charger 

put multi meter on it said 12.9

started this morning ( but slow cranking)

just went out to check it after been standing for a few hrs 12.5

with engine running 14.4

heres a pic of what’s on there at moment 

[Greydog]

Morning Graham

Does your service history show any battery change? As the label indicates it is a BMW fitted part, by the part numbers it may be the original so it could well be 14 years old 😲

The Voltage readings seem to show a battery in reasonable condition though at 14 starting current could be giving it a beating. Before jumping in and changing the battery check the engine earth strap and all connections at the starter motor. Magnetti starter motors did have a reputation for pulling huge current as they age so if can get access to a clamp ammeter measure the draw at start. I have seen reports of 800+amps.

Dave

[graham k]

12 hours ago, Greydog said:

Morning Graham

Does your service history show any battery change? As the label indicates it is a BMW fitted part, by the part numbers it may be the original so it could well be 14 years old 😲

The Voltage readings seem to show a battery in reasonable condition though at 14 starting current could be giving it a beating. Before jumping in and changing the battery check the engine earth strap and all connections at the starter motor. Magnetti starter motors did have a reputation for pulling huge current as they age so if can get access to a clamp ammeter measure the draw at start. I have seen reports of 800+amps.

Dave

Thanks dave 👍

checked again first thing this morning before starting 

showed 12.2, no information in service history of any change of battery, I think it maybe the original as well 😱😱

i

[graham k]

2 minutes ago, graham k said:

Thanks dave 👍

checked again first thing this morning before starting 

showed 12.2, no information in service history of any change of battery, I think it maybe the original as well 😱😱

i

Think i will take it to my trusty mechanic and get him to test the battery 👍