[delta0]

I've just checked the battery and got these voltages:

12.5v unloaded
11.8v with electronics powered up in car
9.8v cranking

Running voltage was fine.

New battery time?

 

[delta0]

Having looked into this a bit more i think the voltages seem reasonable.

 

[PURDIE BOY]

A fully charged battery should be putting out 14.4 volts underload and when cranking over the engine it shouldnt drop under 9.6 volts.

 

[stoney]

the only way to properly test a battery is with a load tester that tests output voltage under heavy load. it's possiblt to have a dead cell and still see a healthy voltage under certain conditions

 

[delta0]

Cranking is the loaded battery voltage. It seems ok. 9.6v min is what i read too.

 

[Lucusade]

Testing a car battery voltage isnt that good of an indication. I would'nt replace it because the voltage is a bit low. How is it acting? Causing any problems? Not starting in the cold? When tempertures are lower the chemical reaction is slowed so if your battery survied the w
inter It should last the summer.

 

[delta0]

Testing a car battery voltage isnt that good of an indication. I would'nt replace it because the voltage is a bit low. How is it acting? Causing any problems? Not starting in the cold? When tempertures are lower the chemical reaction is slowed so if your battery survied the w
inter It should last the summer.

Loaded voltage and hydrometer are the standard health checks. The battery is behaving ok. It is over 5 years old now.

 

[tomo2001]

If it ain't broke..................

 

[delta0]

If it ain't broke..................

Exactly. I think i will wait for it to play up one morning. The voltages suggest it has some life yet.

 

[dodger]

Loaded voltage and hydrometer are the standard health checks. The battery is behaving ok. It is over 5 years old now.

Quite agree, you can tell alot from these tests.

Just keep an eye on it and see what it is like in September. If its going to fail the start of the cold weather in the usual time.

 

[xxDIABLOxx]

My new battery - over OBD2 reader was 14,4 highest and 13,6 lowest...

 

[delta0]

My new battery - over OBD2 reader was 14,4 highest and 13,6 lowest...

I assume that is unloaded or engine running?