Craftsman 5166 Operator's Manual page 9

OPERATION
BATTERY PROTECTION
The battery circuitry protects the battery pack from extreme temperature, over-
discharge, and overcharge. To protect the battery from damage and prolong
its life, the battery pack circuitry will turn off the battery pack if it becomes
overloaded or if the temperature becomes too high during use. This may happen
in extremely high torque, binding, and stalling situations. This intelligent system
will shut down your battery pack if its operating temperature exceeds 167°F
(75°C) and will begin normal operation when it returns to 149°F (65°C).
This Lithium-Ion battery pack will provide optimal performance at temperatures
at or below 104°F (40°C).
NOTICE: A significantly reduced run time after fully charging the battery pack
indicates that the batteries are near the end of their usable life and must
be replaced.
COLD WEATHER OPERATION
When the battery pack is very cold, it may "pulse" for the first minute of use to warm
itself. Put the battery pack on a tool and use the tool in a light application. After
about a minute, the battery pack will have warmed itself and will operate normally.
WHEN TO CHARGE THE BATTERY PACK
It is not necessary to run down the battery pack charge before recharging. The
Lithium-Ion battery can be charged at any time and will not develop a "memory"
when charged after only a partial discharge. Remove the battery pack from the
tool when it is convenient for you and your job. "Top off" the battery pack charge
by charging it for a time before starting a big job or long period of use.
Due to Lithium-Ion fade-free properties, the only time it is necessary to charge
the Lithium- Ion battery pack is when the pack has reached the end of its
charge. To signal the end of charge, power to the tool will drop quickly. Charge
the battery pack as needed.
NOTICE: This Lithium-Ion battery pack is shipped partially charged. Before
using it the first time, fully charge the battery pack.
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