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Premium Member
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2,617 Posts
Discussion Starter · #1 ·
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?
 

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Premium Member
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612 Posts
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.
 

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10,524 Posts
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
 

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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.
 

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Premium Member
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2,617 Posts
Discussion Starter · #7 ·
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.
 
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