jcb S1530E Operator's Manual page 86

Always disconnect all external power supplies to the machine before carrying out maintenance.
The battery should be checked when the motor is running, this will avoid mis-reading the charge level because
of battery voltage recovery due to lack of current draw.
An approximate charge level of the battery is shown on the platform controller and battery charger display.
When the level of batteries is about 20%, the battery must be charged. Never let the battery fully discharge
before charging.
When the battery voltage is low, select low speed mode and drive at low speed / half throttle to a charge location.
For machines with Lithium Iron Phosphate Batteries; If the machine is driven on low battery level for too long,
the battery management system will cut off the electrical supply from the batteries, to protect the batteries from
too deep a discharge. Restarting the machine will have no effect. The machine will be non-operational until the
charger is connected to an external power supply.
Charge the Battery
When charging the batteries, refer to the battery charger display to view the charge status of the batteries.
Refer to Figure 49.
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Table 11. Platform Control Display
Fully charged
30%
Charge battery now
Battery too low - charge battery now
Table 12. Ground Control Display
Operational
Not operational
9831/3200-3
Maintenance
Electrical System
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