Jeep 1987 Wrangler Workshop Manual page 548

ELECTRICAL
BATTERIES
SEE
I.S.
N
O
T
E
S
If the specific gravity of all cells is above 1.235,
but the variation between cells is more than 50
points (0.050), it is an indication that the battery
is unserviceable. Remove the battery from the
vehicle for additional testing.
If the specific gravity of one or more cells is less
than 1.235, recharge the battery at a rate of
approximately five amps until three consecutive
specific gravity tests, taken at one-hour
intervals, are constant.
If the cell specific gravity variation is more than
50 points (0.050) at the end of the charge period,
replace the battery.
When the specific gravity of all cells is above
1.235 and variation between cells is less than 50
points (0.050), the battery may be tested under
heavy load.
NOTE: The specific gravity is a ratio of the
density of the electrolyte and the density of pure
water. The electrolyte is composed of sulfuric
acid and water. Acid comprises approximately
35 percent by weight or 24 percent by volume.
State of Charge
Specific Gravity Charge Rate Charging Time
Fully Charged 1.265 20 30 min
75% Charged 1.225 20 50 min
50% Charged
1.190 20 70 min
25% Charged
1.155 20 90 min
Discharged
1.120 5 12 hrs
60340A
C-10