Specific Gravity Corrections
Never let the battery discharge below the minimum value
given by the manufacturer. A fully charged battery will have
a specific gravity of 1.265 to 1.310 at 25 °C (77 °F) or the
value specified by the manufacturer. The cells must be
equally charged. If necessary, give a new battery a slow
rate charge for 3 to 6 hours after the normal charge is com-
plete for an equal charge on all cells.
NOTE: Frequent charging of a battery that has a 2/3 or
more charge can decrease battery life.
Figure 15. Checking Specific Gravity With Hydrometer
Maintenance
63