DeWalt DW934 Instruction Manual page 9

629182-00,DW934 7/10/06 4:17 PM
all safety instructions before using your charger. Consult the chart
on the back cover of this manual for compatibility of chargers and
battery packs.
Charging Procedure
DANGER: Electrocution hazard. 120 volts are present at charg-
ing terminals. Do not probe with conductive objects.
1. Plug the charger into an appropriate outlet.
2. Insert the battery pack into the charger. The red (charging) light
will blink continuously indicating that the charging process has
started.
3. The completion of charge will be indicated by the red light remain-
ing ON continuously. The pack is fully charged and may be used
at this time or left in the charger.
Indicator Light Operation
Charge Indicators
Some chargers are designed to detect certain problems that can
arise with battery packs. Problems are indicated by the red light
flashing at a fast rate. If this occurs, re-insert battery pack into the
charger. If the problem persists, try a different battery pack to deter-
mine if the charger is OK. If the new pack charges correctly, then the
original pack is defective and should be returned to a service center
or other collection site for recycling. If the new battery pack elicits the
same trouble indication as the original, have the charger tested at
an authorized service center.
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HOT/COLD PACK DELAY
Some chargers have a Hot/Cold Pack Delay feature: when the
charger detects a battery that is hot, it automatically starts a Hot
Pack Delay, suspending charging until the battery has cooled. After
the battery has cooled, the charger automatically switches to the
Pack Charging mode. This feature ensures maximum battery life.
The red light flashes long, then short while in the Hot Pack Delay
mode.
PROBLEM POWER LINE
Some chargers have a Problem Power Line indicator. When the
charger is used with some portable power sources such as genera-
tors or sources that convert DC to AC, the charger may temporarily
suspend operation, flashing the red light with two fast blinks fol-
lowed by a pause. This indicates the power source is out of limits.
LEAVING THE BATTERY PACK IN THE CHARGER
The charger and battery pack can be left connected with the red
light glowing indefinitely. The charger will keep the battery pack
fresh and fully charged.
NOTE: A battery pack will slowly lose its charge when kept out of
the charger. If the battery pack has not been kept on maintenance
charge, it may need to be recharged before use. A battery pack
may also slowly lose its charge if left in a charger that is not plugged
into an appropriate AC source.
WEAK BATTERY PACKS: Chargers can also detect a weak bat-
tery. Such batteries are still usable but should not be expected to
perform as much work. In such cases, about 10 seconds after bat-
tery insertion, the charger will beep rapidly 8 times to indicate a
weak battery condition. The charger will then go on to charge the
battery to the highest capacity possible.
Important Charging Notes
1. Longest life and best performance can be obtained if the bat-
tery pack is charged when the air temperature is between 65°F
and 75°F (18°- 24°C). DO NOT charge the battery pack in an
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