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Here are some battery terms, from http://www.jumpstarter.com/common.htm:
Amp Hour Rating
An Amp hour is defined as the number of hours a new, fully charged
battery can be discharged to a battery voltage of 10.5 volts. Which
means how much useful energy can the battery provide.
Cold Cranking Amp
Abbreviated: CCA
CCA is the discharge load in amps, a new fully
charged battery can deliver continuously at 0' F for 30 seconds
and maintain terminal voltage equal to or higher of 7.2 volts.
Cranking Amp
Abbreviated: CA
CA is the discharge load in amps, a new fully
charged battery can deliver continuously at 32' F for 30 seconds
and maintain terminal voltage equal to or higher of 7.2 volts.
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