Exide Technologies GB3979 - Manual (Page 5)

4. OPERATION
Batteries are rated in ampere-hours (Ah) and are selected to perform a specific workload
within an established period of time. Increasing the workload or time period could result
in over discharging, thus shortening battery life. Limit discharging of the battery (to 80%
or less) so that specific gravities do not go below 1.180. If truck operation results in only
partial discharges (40% or less) and specific gravities are 1.250 or more at the end of
the shift, recharging may be deferred and the battery used for another shift, providing the
workload is not expected to increase. Hydrometer readings and experience will
determine the frequency of charge intervals under these circumstances.
A battery should always be recharged immediately following a complete discharge. Never
allow it to remain in a discharged condition, otherwise, permanent damage may result.
A battery is designed to be operated as follows:
8 hours discharge
8 hours charge
8 hours cool-down
Tubular batteries are designed and built to deliver 80% of their rated capacity at 77˚ F
(25˚ C) each cycle.
5. TEMPERATURE
In the operation of motive power lead acid batteries, the electrolyte temperature must not
exceed 110˚ F (43˚ C). If the battery is continuously operated at or above this
temperature, the service life of the battery will be severely diminished. Under normal
operating conditions, battery electrolyte temperature should be maintained between 60-
100˚ F (15-38˚ C). Following charging, the battery should be allowed to cool-down or rest
approximately 8 hours prior to another discharge cycle.
If a battery is ever hot to the touch, allow it to cool to room temperature before charging
or discharging. If a battery consistently operates at high temperatures greater than 100˚
F (38˚ C), contact your local GNB Industrial Power representative for service.
Page 3
IF BATTERIES ARE NOT IN USE, KEEP THEM CHARGED.
CHECK THE SPECIFIC GRAVITIES MONTHLY AND GIVE A FRESHENING CHARGE
(3 OR 4 HOURS AT THE FINISH RATE) IF THE GRAVITIES HAVE FALLEN 0.030 OR
MORE; OTHERWISE GIVE A FRESHENING CHARGE EVERY THREE MONTHS.