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| CHARGE RATE/ |
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BATTERY SIZE/RATING | CHARGING TIME - HOURS | |||||
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| 2 AMP | 20 AMP | 60 AMP | |
SMALL | Motorcycle, gar- | 6 - 12 AH | 2 - 4 | NR | NR | |
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BATTERIES | den, tractor, etc. | 12 - 32 AH | 4 - 10 | NR | NR | |
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| 200 - 315 CCA | 40 - 60 RC | 11 - 14 | 60 - 90 | 20 - 30 | |
| min. | min. | ||||
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CAR/TRUCKS | 315 - 550 CCA | 60 - 85 RC | 14 - 18 | 90 - 120 | 30 - 40 | |
min. | min. | |||||
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| 550 - 1000 CCA | 85 - 190 RC | 18 - 35 | 2 - 3.5 | 45 - 60 | |
| hrs. | min. | ||||
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| 80 RC | 18 | 105 min. | NR | |
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| 140 RC | 27 | 2 hrs., | NR | |
MARINE/DEEP CYCLE | 45 min. | |||||
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160 RC | 30 | 3 hrs. | NR | |||
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| 180 RC | 33 | 3.5 hrs. | NR | |
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14.2 The Hydrometer or Electronic Method
To find the time needed to fully charge your battery, determine the bat- tery’s charge level with a hydrometer or electronic
SPECIFIC GRAVITY | PERCENT OF CHARGE | PERCENT OF CHARGE |
|
| NEEDED |
1.265 | 100% | 0% |
1.225 | 75% | 25% |
1.155 | 25% | 75% |
1.120 | 0% | 100% |
When you know the percent of charge and the Amp Hour (AH) rating of your battery, you can calculate the approximate time needed to bring your battery to a full charge.
To convert Reserve Capacity to Amp Hours, divide Reserve Capacity by 2, and add 16:
Amp Hours = Reserve Capacity + 16
2
NOTE: The Reserve Capacity can be obtained from the battery specifica- tion sheet or the owner’s manual.
To calculate time needed for a charge:
•Find the percent of charge needed. (A battery at 50 percent charge that
•15 •
