Sears 200.713121 - Manual (Page 11)

11
SAFETY
OPERATION
MAINTENANCE
TROUBLESHOOTING
PARTS
CALCULATING CHARGE TIME
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 your battery type and its associated
Charge Time in the table. Common battery types are:
Motorcycle
200 - 315
315 - 550
550 - 1000
Marine and
6 - 12
12 - 32
12 AMP
NA
NA
1 - 2
2 - 3
3 - 5¾
2½
4½
5
5½
2 AMP
2 - 4
4 - 10
8 - 11
11 - 16
16 - 35
15
26
30
33
Voltmeter Method
To find the time needed to fully charge your battery, determine the battery’s charge level
with a voltmeter or electronic State-of-Charge 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.
Car and
Charge-Time (Hours) Battery
Type
• 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), or both.
• Marine, or deep cycle batteries, usually rated in either Amp-Hours or Reserve
Capacity (RC).
Charge Time Table for Batteries at 50% State-of-Charge
NA = Not Allowed. DO NOT charge at this setting
Battery Rating
and tractor
Truck
Deep Cycle
AH CCA RC
40 - 60
60 - 85
85 -190
80
140
160
180
75 AMP
NA
NA
NA
NA
NA
NA
NA
NA
NA
Charge Factor Table
Voltmeter Reading
State-of-Charge
Reading Charge Factor
12 Volt Battery
12.67
12.45
12.25
12.06
11.86
6 Volt Battery
6.22
6.34
6.12
6.03
5.93
100%
50%
25%
0%
75%
0
0.50
0.75
1
0.25
40
80
95
105