Charge Indicators - DeWalt DC727 Instruction Manual

Using Automatic Tune-Up™ Mode
The Automatic Tune-Up™ Mode equalizes or balances the individual
cells in the battery pack allowing it to function at peak capacity. Battery
packs should be tuned up weekly or after 10 charge/discharge cycles
or whenever the pack no longer delivers the same amount of work. To
use the Automatic Tune-Up™, place the battery pack in the charger
and leave it for at least 8 hours. The charger will cycle through the fol-
lowing modes.
1. The red light will blink continuously indicating that the 1-hour
charge cycle has started.
2. When the 1-hour charge cycle is complete, the light will stay on
continuously and will no longer blink. This indicates that the pack
is fully charged and can be used at this time.
3. Whenever the pack is left in the charger after the initial 1-hour
charge, the charger will begin the Automatic Tune-Up™ Mode.
This mode continues up to 8 hours or until the individual cells in
the battery pack are equalized. The battery pack is ready for use
and can be removed at any time during the Tune-Up™ Mode.
4. Once the Automatic Tune-Up™ Mode is complete the charger will
transition to a maintenance charge; the indicator light shuts off
when the Automatic Tune-Up™ Mode is complete.
SAVE THESE INSTRUCTIONS
FOR FUTURE USE
Chargers
Your tool uses a 12.0, 14.4, or 18.0 Volt D
can be charged in D WALT 1 Hour Chargers, 15 Minute Chargers or
E
Vehicular 12 volt charger. Be sure to read 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 (Fig. 1)
1. Plug the charger into an appropriate outlet before inserting battery
pack.
WALT Charger. Your battery
E
5
FIG. 1
2. Insert the battery pack into the charger, as shown in Figure 1,
making sure the pack is fully seated in 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.
CAUTION: 120 volts present at charging terminals. Do not probe
with conductive objects. Danger of electric shock or electrocution.
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 flash-
ing at a fast rate. If this occurs, re-insert battery pack into the charg-
er. If the problem persists, try a different battery pack to determine 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