TM 9-6140-200-14
CAUTION
Use only battery chargers appropriate to charge GEL batteries,
restricted to 14.1--14.4 volts maximum. Any other battery charger will
shorten the life of the battery and cause internal damage.
(2) Charge GEL batteries (NBB248) in accordance with the time, state of
charge and the initial output (Amps) of the charger. See table below:
Battery State
Of Charge
Approximate time in hours required to
Full Charge at 14.4 volts (Charger Output in Amps)
40 Amps
20 Amps
10 Amps
10%
5.0 hours
6.0 hours
9.0 hours
30%
3.0 hours
4.0 hours
7.0 hours
50%
2.0 hours
3.0 hours
5.0 hours
(3) After charging let stand for 3 to 10 hours to dissipate surface charge and
test voltage IAW Paragraph la above.
NOTE
Do not charge GEL batteries when temperature exceeds
122 degrees F. (50 C). Also, Do not charge GEL batteries
below 41 degrees F. (5 C.) because of the slow reaction
and lengthy recharging times (up to 60% more).
5-8
