Napa 85-640 Manuel D'instructions page 12

0.5 CAUTION - Do not leave Manual chargers unattended.
0.6 CAUTION: If at any time the battery gets hot (above 25°F (52°C)) or acid
comes out of vent caps, STOP charging.
0.7 To maximize battery life - Let automatic chargers complete charging.
11. MULTIPLE BATTERY CHARGING
Batteries of the same voltage may be connected in parallel for
maintenance charging. Charge time increases in proportion to the number
of batteries. Rate of charge decreases in the same proportion.
Example: Charging 2 batteries in parallel will take 2 times longer; each
battery receives /2 the amount of charge showing on the ammeter. Thus,
if the ammeter shows a 30-amp charge, each battery will get a 5-amp
charge (when batteries have the same rating, same state of charge, etc.).
12. CHARGER FEATURES AND CONTROLS
2. DIGITAL DISPLAY BUTTON
Use this button to set the function of the digital display to one of the
following:
• BATTERY %: The digital display shows an estimate of the percent of
charge of the battery connected to the charger battery clamps.
• VOLTAGE: The digital display shows the voltage at the charger battery
clamps in DC volts.
• ALTERNATOR %: The digital display shows an estimated percentage
of the output of the vehicle charging system connected to the charger
battery clamps as compared to a properly functioning system.
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