Charging A Completely Discharged Battery: Notes

The following procedure should be used to recharge a completely discharged battery. Unless this procedure is properly followed, a good battery may be needlessly replaced. Charging the battery depends on battery temperature. A good depleted battery accepts charge at higher rate when battery temp is over 0°C or 32°F.

1. Measure the voltage at the battery posts with a voltmeter, accurate to 0.10 volt. If the battery is below 10 volts it is considered to be extremely discharged.
2. Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.
3. Battery charger will vary in the amount of voltage and current provided. The amount of time required for a battery to accept varies.