What is an equalizing charge and when should I use it?
All cells in a battery have slightly different characteristics. This means, in effect, that the amount of charge required is different for each cell. This is accentuated after very deep discharges and may be observed by small variations in the value of voltage and specific gravity readings between each cell after charging has been completed. If the variation is allowed to continue, the differences may be further accentuated and the effective working life of the battery may be reduced. To avoid this, an equalizing charge is recommended. This is an extended charge which should be given at least once a week. Most chargers have an automatic switch which selects the special rate for an equalizing charge. Such a charge is complete when the voltage and specific gravities of the cells have remained constant over three successive hourly readings.
