Battery Charging - Crown C48-2+2 Owner's Manual And Service Manual

OPERATION AND SERVICE INFORMATION
charged battery has a specific gravity of 1.275, and the battery is allowed to sit unused, it will become
partially discharged. When it reaches 1.240, which it will do in less than twenty days, it should be recharged.
If a battery is left in a discharged state, sulfating takes place on and within the plates. This condition is not
reversible and will cause permanent damage to the battery. In order to prevent damage, the battery should be
recharged. A hydrometer can be used to determine the specific gravity and therefore the state of charge of a
battery.
In winter conditions, the battery must be fully charged to prevent the possibility of freezing (Ref Fig. 29 on
page 23). A fully charged battery will not freeze in temperatures above -75° F (-60° C). Although the
chemical reaction is slowed in cold temperatures, the battery must be stored fully charged, and disconnected
from any circuit that could discharge the battery. For portable chargers, disconnect the charging plug from the
vehicle receptacle. The batteries must be cleaned and all deposits neutralized and removed from the battery
case to prevent self discharge. The batteries should be tested or recharged at thirty day minimum intervals.

BATTERY CHARGING

The battery charger is designed to fully charge the battery set. If the batteries are severely deep cycled, some
automatic battery chargers contain an electronic module
that may not activate and the battery charger will not function. Automatic chargers will determine the correct
duration of charge to the battery set and will shut off when the battery set is fully charged. Always refer to the
instructions of the specific charger used.
Before charging, the following should be observed:
CAUTION
Do not overfill batteries. The charging cycle will expel electrolyte and result in component
damage.
The electrolyte level in all cells must be at the recommended level and cover the plates.
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Owner's Manual and Service Guide