Schumacher PI-100SL - Manual (Page 5)

5
POWER SOURCE
Your average automobile or marine battery at full charge
will provide an ample power supply to the inverter for ap-
proximately  hours when the engine is off. The actual length
of time the inverter will function depends on the age and
condition of the battery and the power demand being placed
by the device being operated with the inverter.
Before starting the engine, disconnect the inverter’s plug
from the 12V accessory outlet. To maintain battery power,
run the engine every 2 to  hours for approximately 10
minutes to recharge the battery. While the PI-100SL draws
very low amperage when not in use, it should be unplugged
to avoid battery drain.
USAGE EXAMPLES
Device Type Estimate Wattage
Cell Phones, MP  Players,
PDAs
10 watts
Radios 15 watts
Portable CD 50 watts
Laptop Computers 60-80 watts
Video Games 80 watts