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• 13 •
The 2 amp charge rate may not indicate activity on the meter. The meter
does not have the resolution to display this low rate.
CALCULATING CHARGE TIME13.
The Chart Method13.1
Use the following table to more accurately determine the time it will take to
bring a battery to full charge. First, identify where your battery ts into the
chart.
Small batteries — motorcycles, garden tractors, etc. — are usually rated •
in Ampere Hours (AH). For example: 6 to 12 AH, or 12 to 32 AH.
Batteries in cars and smaller trucks are usually rated in Reserve Capacity •
(RC), Cold-Cranking Amps (CCA), or both.
Marine or deep-cycle batteries are usually rated in Reserve Capacity •
(RC).
• NR means that the charger setting is NOT RECOMMENDED.
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-percent charge rate prior to recharging. Add more time for severely
discharged batteries. Time is given in hours unless otherwise specied.
BATTERY SIZE/RATING
CHARGE RATE/
CHARGING TIME - HOURS
2 AMP 40 AMP
SMALL
BATTERIES
Motorcycle, gar-
den, tractor, etc.
6 - 12 AH 2 - 4 NR
12 - 32 AH 4 - 10 NR
CAR/TRUCKS
200 - 315 CCA 40 - 60 RC 11 - 14 30 to 45 min.
315 - 550 CCA 60 - 85 RC 14 - 18
45 min - 1
hour
550 - 1000 CCA 85 - 190 RC 18 - 35 1 - 2 hours
MARINE/DEEP CYCLE
80 RC 18 NR
140 RC 27 NR
160 RC 30 NR
180 RC 33 NR