SAAB WIS ONLINE

MEASUREMENT

MEASUREMENT

Warning

Do not bring an open flame close to the battery at this time.


Important
• Prior to charging, corroded terminals should be cleaned with a brush and common caustic soda solution.

• Be careful since the battery electrolyte overflows while charging the battery.

• Observe the instructions when handling battery charger.

• Before charging the battery on vehicle, disconnect battery ground terminal to prevent damage of generator diodes or other electrical units.


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

State of charge

Corrective action

Green dot

Above 65%

Load test

Dark dot

Below 65%

Charge battery

Clear dot

Low electrolyte

Replace battery*

(If cranking is difficult)

*: Check electrical system before replacement.



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.

• Never use more than 10 amperes when charging the battery because that will shorten battery life.