Electrical
Is the amperage higher than the
Standard charging amperage written
on the battery?
This type of battery charger cannot
charge a Maintenance Free Battery. A
Variable Rate charger is needed.
Charge the battery until the charging
amperage drops all the way down,
usually 1 amp.
Using a Constant Voltage Charger (Lead Acid Battery)
Yes No
Set Charge time to a maximum of
20 hours
Measure the open circuit voltage
prior to charging.
Connect the charger and ammeter to the battery and start charging.
Make sure the setting is at 1/10 the amp hour rating of the battery.
This is typically 2 amp 12 Volts.
Leave battery for 30 minutes to settle
before measuring the open circuit
voltage.
12.8 V Fully Charged
12.0‐12.7 V Not Fully Charged
Under 12.0 V Replace the Battery
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