Isuzu AU-4LE1T, Maintenance Manual

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(1) Battery Servicing
Battery maintenance schedules will vary with equipment and battery
types.
Follow the equipment manufacturer’s instructions.
Gravity of the batteries
The battery charge condition is judged by the electrolyte gravity
measurement.
Periodically measure the electrolyte gravity of the batteries.
For the internal check follow the equipment manufacturer’s standard.
The relationship between the electrolyte specific gravity and the battery
conditions are as follows:
Electrolyte Specific Gravity Battery Conditions
Over 1.300 Over 100% (Over charged)
1.290 ~ 1.270 100%
1.260 ~ 1.240 75%
Below 1.230 Below 50% (Insufficiently charged)
CAUTION:
The battery electrolyte is dilute sulfuric acid. So, be careful not
to stain your body and clothes with it. If stained, rinse portion
in clean water.
Eye level
Electrolyte
Specific
gravity
IMWG0025