ARMY TM 9-6115-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
2-12 BATTERIES.
2-12-1 Testing.
a.
b.
c.
d.
e.
f.
g.
2-12-2
a.
WARNING
Batteries give off a flammable gas. Do not smoke or use open flame when performing
maintenance. Flames and explosion could result in severe personal injury or death.
Shut down generator set.
Open battery access door and disconnect negative battery cable.
Remove battery vent caps.
Test specific gravity of electrolyte in each battery ceil with a hydrometer. Refer to TABLE 2-7 for state of charge
with specific gravity corrected to 80O F (27OC). Refer to TABLE 2-8 for specific gravity temperature corrections.
Recharge or replace batteries as necessary. Retest batteries per above instructions
Install battery vent caps.
Connect negative battery cable. Close battery access door.
Removal.
Shut down generator set.
TABLE 2-7.
State of Charge with Specific Gravity Corrected to 80OF (27°C)
Specific Gravity
1.280
100
1.250
75
1.220
50
1.190
25
1.160
Little useful capacity.
1.130
Discharged
Percent Charge
2-30
