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BATTERY SIZE/RATING
CHARGE RATE/CHARGING TIME
2 A
15 A
Small batteries Motorcycle, garden
tractor, etc
6 – 12 Ah
2 – 3 3/4 h
NR
12 – 32 Ah
3 3/4 – 10 h
NR
Cars/trucks
200 – 315 CCA
40 – 60 RC
11 1/4 – 14 1/2 h
1 1/2 – 2 h
315 – 550 CCA
60 – 85 RC
14 1/2 – 18 1/4 h
2 – 2 1/2 h
550 – 1000 CCA
85 – 190 RC
18 1/4 – 34 3/4 h
2 1/2 – 4 1/2 h
Marine/deep-cycle
80 RC
17 1/2 h
2 1/4 h
140 RC
27 h
3 1/2 h
160 RC
30 h
4 h
180 RC
33 h
4 1/2 h
CCA: Cold cranking amps.
RC: Reserve capacity.
Ah: Amp hour.
NR: Not recommended.
4. Crank the engine until it starts or 5 seconds pass. If the engine does not start, wait 4 minutes before
cranking again. This allows the battery and the charger to cool down.
5. If the engine fails to start, charge the battery for 5 more minutes before attempting to crank the engine
again.
6. After the engine starts, unplug the AC power cord and then disconnect the battery clips from the vehicle.
7. Clean and store the charger in a dry location.
Use the following table to more accurately determine the time it will take to bring a battery to full charge.
Find your battery’s rating on the chart below, and note the charge time given for each charger setting. The
times given are for batteries with a 50% charge prior to recharging. Add more time for severely discharged
batteries.
CALCULATING CHARGE TIME
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NOTE:
• During extremely cold weather, or if the battery is under 2 volts, charge the battery for 5 minutes
before cranking the engine.
• If the engine turns over but never starts, there is not a problem with the starting system. There is a
problem elsewhere in the vehicle. STOP cranking the engine until the problem has been diagnosed and
corrected.
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