BATTERIES
Battery Testing
Page 13-12
2004 Precedent Electric Golf Car Maintenance and Service Manual
13
Performing the Discharge Test, Continued:
3. Check and record the electrolyte temperature of the battery packs. Check cell no. 2 (second cell from
positive post) in each battery.
4. Reset discharge machine and turn the tester ON.
5. When the batteries have been discharging for approximately 60 minutes, set the discharge machine to
function 3 and check battery set voltage. Check voltage every 10 minutes throughout the rest of the test.
As soon as the battery set voltage reaches .5 volts above the shut-off point (42.0 volts), use a multimeter
to measure individual battery voltages. Measure and record the voltage of each battery to the nearest .01
volt.
NOTE:
The tester will shut off automatically when shut-off voltage is reached.
Interpreting Discharge Test Results
1. If discharge time is 60 minutes or higher, the problem is not with the batteries.
2. If discharge times are low (less than 60 minutes), replace batteries below 10.05 volts.
3. In general, battery sets that discharge in less than 60 minutes at 78 °F (25.6 °C) on the discharge test
will typically not hold a charge for an entire work shift. However, discharge time is dependent on the elec-
trolyte temperature. The table shown gives the discharge times, at various temperatures, of a set of bat-
teries that delivers 62 minutes at 80 °F (26.7 °C).
BATTERY VOLTAGES
BATTERY CONDITION
1
2
3
4
10.50 V
10.50 V
10.50 V
10.50 V
Excellent
10.60 V
10.60 V
10.83 V
9.75 V
Battery no. 4 is near end of useful life
10.8 V
10.8 V
10.01 V
9.41 V
Battery nos. 3 and 4 are near end of useful life
ELECTROLYTE
TEMPERATURE
DISCHARGE TIME TO
SHUT-OFF POINT
ELECTROLYTE
TEMPERATURE
DISCHARGE TIME TO
SHUT-OFF POINT
40-49 °F
(4-9 °C)
40 Minutes
85-89 °F
(29-32 °C)
64 Minutes
50-59 °F
(10-15 °C)
45 Minutes
89-99 °F
(32-37 °C)
66 Minutes
60-64 °F
(16-18 °C)
50 Minutes
100-109 °F
(38-43 °C)
68 Minutes
65-69 °F
(18-21 °C)
54 Minutes
110-119 °F
(43-48 °C)
70 Minutes
70-74 °F
(21-23 °C)
57 Minutes
120-129 °F
(49-54 °C)
72 Minutes
75-79 °F
(24-26 °C)
60 Minutes
130-150 °F
(54-66 °C)
74 Minutes
80-84 °F
(27-29 °C)
62 Minutes
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