Ram Trucks 2012 Chassis Cab - Diesel Supplement - Manual (Page 97)

With Portable Starting Unit
There are many types of these units available. Follow the
manufacturer’s instructions for necessary precautions
and operation.
CAUTION!
It is very important that the starting unit operating
voltage does not exceed 12 Volts DC or damage to
battery, starter motor, alternator, or electrical system
may occur.
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WHAT TO DO IN EMERGENCIES 95