Load testing a battery

[nswst8]

If a no start, check battery voltage engine off. If 10-12 volts showing load test.

If able check battery H2o level (Should be 1/2" - 3/4" from top of opening)

6 cells: 2.1 volts per cell = 12.6 volt battery

With a DVOM set to 40dcv attach leads to battery:
(RED to POSITIVE)
(BLACK TO NEGATIVE)

Have someone watch the DVOM while you attempt to start, if the volts drop below 9.6 volts.

You have a bad battery

Just good info to know.

[Hauntd ca3]

i use 8v as a limit for cranking volts
best way is to go to your local auto sparky and get a proper load test done
tha loads the batt to half its cca rating for 10 sec or more depending on the operator
and measures the voltage as wel

[nswst8]

These are just some useful no start info tips for the DIYer.

Remember that your going to take it in to swap it out anyway.

[tenchimuyo93]

i just buy a load tester for me, just connect to battery then hit the test button for 5 sec and read voltage during and after.



down side is it gets hot as hell.