Manual

B-6
OPERATION
B-6
NOTE: If the battery is rated in RESERVE CAPACI-
TY, use the following formula to convert
reserve capacity to amp‐hours.
Reserve Capacity
2
AUTOMATIC / MANUAL BATTERY CHARGERS / STARTERS HOUSEHOLD CHARGERS
CHARGING TIME INSTRUCTIONS
The following instructions will allow you to determine
how long it will take to bring a specific battery to full
charge in a MANUAL charge setting. If you use an
AUTOMATIC setting, a green light on the charger will
indicate the battery has become fully charged, so you
can disregard this section.
Batteries that have 25% charge or less can easily
freeze and should be charged at once, but DO
NOT CHARGE A BATTERY THAT IS ALREADY
FROZEN.
1. Determine the present level of charge in the battery
with a hydrometer or electronic percent‐of‐charge
tester.
2. Determine the size of the battery in AMP HOURS
or RESERVE CAPACITY. If these ratings are not
printed on the battery, contact your local battery
dealer for this information. These are the only rat-
ings that can be used to determine length of charg-
ing time. Then use the formula below to determine
the charging time.
EXAMPLE:
Battery’s Present State of Charge: 25%
Percent of Charge Needed: 100% – 25% = 75%
Expressed as a Decimal: = .75
Amp setting on Charger: 10
Amp‐Hour Rating of Battery: 60
60 X .75
10
45
10
4.5 X 1.25 = Hours to Reach Full Charge
CAUTION
X 1.25 = Hours to Reach Full Charge
+ 15.5 = Amp‐Hour Rating
X 1.25 = Hours to Reach Full Charge