car battery label

[Mark Johnson]

On my 12V car battery there is a label that says :

038
CCA/SAE 270

What does this mean?
What current is good and for how long should it be charged?

Thank you please

 

[happyhobit]

Mark Johnson <none@none.com> wrote:

On my 12V car battery there is a label that says :

038
CCA/SAE 270

What does this mean?

CCA (Cold Cranking Amps)

SAE 'Society Automotive Engineers' An organization that, among other
things, creates standards like CCA.

270 This battery will deliver 270 amps for 30 sec. at 0 degrees F and
maintain at least 1.2 volts per cell.

What current is good and for how long should it be charged?

A dead battery may accept 20 - 25 amps.

Charge this battery until the voltage/cell equals 2.2 to 2.4 volts @ 70
degrees F. For a 12 volt automotive battery (6 cells) this would be between
13.2 to 14.4 volts.

2.2 volts/cell if the battery is on continuos charge (UPS backup) and 2.4
volts/cell if the charger will be removed when it reaches this value.

--
Jay
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