Battery Rating Method

Use the following table to more accurately determine the time it will take to fully charge a battery that is initially at 50% State-of-Charge. Identify you r battery type and its associated Charge Time in the table. Common battery types are:

Small batteries, motorcycles, garden tractors, etc., are usually rated in Amp-Hours

(AH).

Car and truck batteries, usually rated in Reserve Capacity (RC), Cold-Cranking Amps

(CCA).

Marine, or deep cycle batteries are usually rated in either Amp-Hours or Reserve Capacity (RC).

 

Charge Time Table for Batteries at 50% State-of-Charge

 

Battery

 

 

Battery

Rating

 

 

Charge-Time

(Hours)

Type

 

AH

 

RC

CCA

2 AMP

10 AMP

60 AMP

Motorcycle

6 - 12

 

 

 

 

2 - 4

NA

NA

and Tractor

12 - 32

 

 

 

 

4 - 10

NA

NA

Car and

 

 

40

- 60

200

- 315

8- 11

1 - 2

NA

Truck

 

 

60

- 85

315

- 550

11 - 16

2 - 3

NA

 

 

 

85

-190

550-

1000

16-35

3-7

NA

Marine

and

40

80

 

 

15

3

NA

Deep Cycle

80

140

 

 

26

5

NA

 

 

95

160

 

 

30

6

NA

 

 

105

180

 

 

33

7

NA

NA = Not Allowed. DO NOT charge at this setting.

 

 

 

Voltmeter

Method

 

 

 

 

 

 

 

To find the time needed to fully charge your battery, determine the battery'scharge level with a voltmeter or electronic State-of-Charger Tester. Use the table below to convert Voltmeter and State-of-Charge readings at room temperature to the appropriate Charge Factor. Then use the formulas that follow the table to determine the approximate charge time.

 

Charge

Factor Table

 

 

 

State-of.Charge

 

12 Volt Battery

6 Volt Battery

Reading

 

12.67

6.34

100%

0

12.45

6.22

75%

0.25

12.25

6.12

50%

0.50

12.06

6.03

25%

0.75

11.86

5.93

O%

1

11

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Sears 200.713101 owner manual Cca, 12.67 100% 12.45 75% 12.25 50% 12.06 25% 11.86