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Measure the battery voltage at the battery terminals. Refer to the following table to determine the SOC BATTERY STATE OF CHARGE Use the SOC information as follows: z A battery with a SOC that is below 65 percent must always be recharged before returning it to service or z A battery with a SOC that is 65 percent or greater is generally considered to be charged enough in order CHARGING TIME REQUIRED The time required to charge a battery will vary depending upon the following factors: z The battery charger capacity - The higher the charger amperage, the less time it will take to charge the z The SOC of the battery - A completely discharged battery requires more than twice as much charging z The temperature of the battery - The colder the battery is, the more time it takes to recharge the battery. CHARGING PROCEDURE for 12 hours. Battery Voltage % Charge At 0°C (32°F) % Charge At 25°C (75°C) 12.75 V 100% 100% 12.70 V 100% 90% 12.60 V 90% 75% 12.45 V 75% 65% 12.20 V 65% 45% 12.00 V 40% 20% NOTE: Turn OFF the ignition when connecting or disconnecting the battery cables, the
2004 Hummer H2 2004 STARTING & CHARGING SYSTEMS Starters - H2
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