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Idiomas disponibles
Idiomas disponibles
NOTE: Charger will NOT operate on batteries below 2.0 volts. If a 12 volt battery is
below 2.0 volts, it is probably shorted, open or sulfated and should be replaced.
VERY COLD BATTERY
If the battery to be charged is extremely cold (in temperatures less than freezing – 0˚C
/ 32˚F) it cannot accept a high rate of charge, so the initial charge rate will be slow. The
rate of charge will increase as the battery warms.
WARNING: DO NOT ATTEMPT TO CHARGE A FROZEN BATTERY
CHARGING TIMES
The Power Wizard FarmPro™ 40, a fully automatic Smart Battery Charger, will automati-
cally adjust the charge rate as the battery becomes charged and stops charging when the
battery is fully charged. For estimates of the time it takes to charge a battery, refer to the
following table for details. Deep cycle batteries may need longer charging times. It is rec-
ommended to repeat the charging cycle a second time, beginning with the 2 AMP rate.
The following chart converts hydrometer readings into percent of charge values.
Refer to the chart below for approximate charging times.
SPECIFIC GRAVITY
(HYDROMETER READING)
1.265
1.225
1.190
1.155
1.120
The times shown in the chart above are approximate and refer to an average automo-
tive battery. For smaller batteries, the charge time should be adjusted using the formula
shown below and adding 1 hour to the time calculated.
To estimate charging time for a discharged battery, divide the amp hour (aH) rating of the
battery by the charge rate selected. This is the number of hours required to recharge the
battery. For example, a 50 aH (12 volt) battery is discharged (10 volts). How long should
it be charged at the 10 amp rate? Divide the 50 aH by 10.
Answer: 5.5 hours. Always round up the charge time by 10% to ensure full charge. In
most cases, battery charging times will vary depending on the age and condition of the
battery. Smaller batteries should be charged at a lower rate (2 amps) and add an extra
hour to charge time.
PERCENT OF CHARGE
2 AMPS
10 AMPS
25 AMPS
*Not recommended
PERCENT OF CHARGE
IN BATTERY
100%
75%
50%
25%
0%
75%
50%
6.5 HRS
12 HRS
1.8 HRS
3 HRS
0.8 HRS
1.4 HRS
– 11 –
PERCENT OF CHARGE
NEEDED BY BATTERY
0%
25%
50%
75%
100%
25%
0%
NR*
NR*
4.5 HRS
6 HRS
2 HRS
2.7 HRS
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