Yamaha EF2400iS Owner's Manual page 24

TIP
9 Follow instructions in the owner's manual for the
battery to determine the end of battery charging.
9 Measure the specific gravity of electrolyte to deter-
mine if the battery is fully charged. At full charge,
the electrolyte specific gravity is between 1.26 and
1.28.
9 It is advisable to check the specific gravity of the
electrolyte at least once every hour to prevent over-
charging the battery.
Operating range of DC power supply
(exclusively for charging 12-V battery)
This power source is designed to charge batteries up to
40AH that are half-discharged. Do not charge batteries
of a higher capacity than 40AH.
The time required for recharging a battery varies
depending on the discharge level of the battery. When
the specific gravity of the battery reaches 1.26 to 1.28,
charging is complete.
When charging, check the battery's specific gravity
once an hour.
The average time for charging a half-discharged 40AH
battery is approximately 5 hours.
Be sure to check the battery fluid level before charging.
NOTICE
9 Do not connect any load to the battery or use
the engine starter motor while charging.This
causes high current to flow through the gener-
ator which will burn out the coil.
9 Do not connect a VRLA (Valve Regulated Lead
Acid) battery. To charge a VRLA battery, a spe-
cial (constant-voltage) battery charger is
required.
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