GreenWorks CU800 - Page 87

MAINTENANCE AND ADJUSTMENT OF EV CU800 Service Manual
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NOTE
Since MF batteries are sealed, it is not possible
to check the charge state of the battery by
measuring the specific gravity of the electrolyte.
Therefore, the charge of the battery has to be
checked by measuring the voltage at the
battery terminals.
1. Remove:
• Lift the hood up.
• battery case cover
• Disconnect:
battery leads
NOTE
First, disconnect the negative battery lead ①,
and then the positive battery lead ②.
a. Connect a pocket tester to the battery terminals.
Positive tester probe
positive battery terminal
Negative tester probe
negative battery terminal
NOTE
• The charge state of an MF battery can be
checked by measuring its open-circuit
voltage (i.e., the voltage when the positive
terminal is disconnected).
• No charging is necessary when the open-
circuit voltage equals or exceeds 12.8V.
b. Check the charge of the battery, as shown in
the charts and the following example.
Example:
c. Open-circuit voltage = 12.0 V
d. Charging time = 6.5 hours
e. Charge of the battery = 20 ~ 30%
2. Charge:
• battery (refer to the appropriate charging
method illustration).
WARNING
Do not quick charge a battery.
NOTE
2. Remove:
• battery
3. Check:
• battery charge