MEASUREMENT
MEASUREMENT |
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Important | ||
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Prior to charging, corroded
terminals should be cleaned with a brush and common caustic soda
solution.
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• |
Be careful since the battery electrolyte overflows while
charging the battery.
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• |
Observe the instructions when handling battery charger.
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Before charging the battery on vehicle, disconnect battery
ground terminal to prevent damage of generator diodes or other electrical units.
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JUDGMENT OF BATTERY IN CHARGED CONDITION |
Specific gravity of electrolyte is held within the specified range from 1.250 to 1.290 for more than one hour.
Voltage per battery cell is held at the specified range from 2.5 to 2.8 volts for more than one hour.
STATE OF CHARGE CHECK USING A HYDROMETER |
Hydrometer indicator
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State
of charge
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Corrective
action
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Green
dot
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Above
65%
|
Load
test
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Dark
dot
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Below
65%
|
Charge
battery
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Clear
dot
|
Low
electrolyte
|
Replace
battery*
(If cranking is difficult) |
*: Check electrical system before replacement.
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NORMAL CHARGING |
Charge the battery at current value specified by manufacturer or at approx. 1/10 of the battery’s ampere-hour rating.
QUICK CHARGING |
Quick charging is a method in which the battery is charged in a short period of time with a relatively large current by using a quick charger.
Since a large current flow raises electrolyte temperature, the battery is subject to damage if large current is used for prolonged time. For this reason, the quick charging must be carried out within a current range that will not increase the electrolyte temperature above 40°C (104°F).
It should be also remembered that the quick charging is a temporary means to bring battery voltage up to a fair value and, as a rule, a battery should be charged slowly with a low current.
Important | ||
• |
Observe the items in 3. NORMAL
CHARGING.
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• |
Never use more than 10 amperes when charging the battery
because that will shorten battery life.
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