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 following 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. If 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  begin  a  maintenance 
charge; the red indicator will remain lit.
Chargers 
Be sure to read all safety instructions before using your charger. Consult the chart at the end of 
this manual for compatibility of chargers and battery packs.
Charging Procedure
DANGER: Electrocution hazard. 120 volts present at charging terminals. Do not probe with 
conductive objects. Danger of electric shock or electrocution. 
  1. Plug the charger into an appropriate outlet before inserting battery pack. 
  2. Insert the battery pack into the charger (Fig. 2).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 remaining ON continuously. The 
pack is fully charged and may be used at this time or left in the charger.
NOTE: The DC9320 Dual Port Charger can simultaneously charge two battery packs in about 
one hour.
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 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 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.
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 generators or sources that convert DC to AC, the charger may 
temporarily  suspend  operation,  flashing  the  red  light  with  two  fast blinks  followed  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 battery pack. Such batteries are 
still usable but should not be expected to perform as much work. The charger will indicate to 
replace battery pack.
Important Charging Notes
  1. Longest life and best performance can be obtained if the battery 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 air temperature below +40°F (+4.5°C), or above +105°F (+40.5°C). This is important and 
will prevent serious damage to the battery pack.
  2. The charger and battery pack may become warm to touch while charging. This is a normal 
condition, and does not indicate a problem. To facilitate the cooling of the battery pack after 
use, avoid placing the charger or battery pack in a warm environment such as in a metal 
shed, or an uninsulated trailer.
  3. If the battery pack does not charge properly:
    a.  Check current at receptacle by plugging in a lamp or other appliance
    b.  Check to see if receptacle is connected to a light switch which turns power off when you 
turn out the lights. 
    c.  Move charger and battery pack to a location where the surrounding air temperature is 
approximately 65°F - 75°F (18°- 24°C). 
    d.  If charging problems persist, take the tool, battery pack and charger to your local service 
center.
  4. The battery pack should be recharged when it fails to produce sufficient power on jobs which 
were easily done previously. DO NOT CONTINUE to use under these conditions. Follow the 
charging procedure. You may also charge a partially used pack whenever you desire with 
no adverse affect on the battery pack.
  5. Under  certain  conditions,  with  the  charger  plugged  into  the power  supply,  the  exposed 
charging contacts inside the charger can be shorted by foreign material. Foreign materials 
of a conductive nature such as, but not limited to, steel wool, aluminum foil, or any buildup 
of metallic particles should be kept away from charger cavities. Always unplug the charger 
from the power supply when there is no battery pack in the cavity. Unplug charger before 
attempting to clean.
  6. Do not freeze or immerse charger in water or any other liquid.
WARNING: Shock hazard. Don’t allow any liquid to get inside charger. Electric shock may 
result. 
CAUTION: Never attempt to open the battery pack for any reason. If the plastic housing of 
the battery pack breaks or cracks, return to a service center for recycling.
Storage Recommendations
  1. The best storage place is one that is cool and dry away from direct sunlight and excess heat 
or cold.
  2. Long storage will not harm the battery pack or charger. Under proper conditions, they can 
be stored for 5 years or more.
Repairs
This product is not serviceable. There are no serviceable parts inside the charger. 
READ  ALL  OF  THE  INSTRUCTIONS IN  THE  BATTERY  CHARGER  SECTION  OF  THIS 
MANUAL BEFORE ATTEMPTING TO CHARGE THE BATTERY PACK FOR YOUR TOOL.
To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should 
be performed by certified service centers or other qualified service organizations, always using 
identical replacement parts. 
DC9310
DC9320
Définitions : lignes directrices en  
matière de sécurité  
Les définitions ci-dessous décrivent le niveau de danger pour chaque mot-indicateur 
employé.  Veuillez  lire  le  mode  d’emploi  et  porter  une  attention  particulière  à  ces  
symboles.
DANGER  :  indique  une  situation  dangereuse  imminente  qui,  si  elle  n’est  pas  
évitée, causera la mort ou des blessures graves.
AVERTISSEMENT :  indique une situation potentiellement dangereuse qui, si  elle 
n’est pas évitée, pourrait se solder par un décès ou des blessures graves.
MISE EN GARDE : indique une situation potentiellement dangereuse 
qui,  si  elle  n’est  pas  évitée  pourrait  se  solder  par  des  blessures  mineures  ou 
modérées.
MISE EN GARDE : utilisé sans le symbole d’alerte à la sécurité, indique une situation 
potentiellement dangereuse qui, si elle n’est pas évitée pourrait se solder par des 
dommages à la propriété.
EN  CAS  DE  QUESTIONS  OU  DE  COMMENTAIRES  SUR  CET  OUTIL  OU  SUR  TOUT 
AUTRE OUTIL DeWALT, APPELEZ-NOUS SANS FRAIS AU NUMÉRO SUIVANT : 1-800-4 
DeWALT (1-800-433-9258) 
AVERTISSEMENT ! Lire et comprendre toutes les directives. À défaut de 
suivre les directives sous-mentionnées, un choc électrique, un incendie et des 
blessures corporelles graves pourraient survenir.
Three Year Limited Warranty
DeWALT will repair,  without charge, any  defects due  to  faulty materials or  workmanship for 
three years from the date of purchase. This warranty does not cover part failure due to normal 
wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit 
www.dewalt.com or call 1-800-4-DeWALT (1-800-433-9258). This warranty does not apply to 
accessories or damage caused where repairs have been made or attempted by others. This 
warranty gives you specific legal rights and you may have other rights which vary in certain 
states or provinces.
In addition to the warranty, DeWALT tools are covered by our:
1 YEAR FREE SERVICE
DeWALT will maintain the tool and replace worn parts caused by normal use, for free, any time 
during the first year after purchase. 
2 YEARS FREE SERVICE ON BATTERY PACKS
DC9071, DC9091, DC9096, DC9280, DC9360 and DC9180 
90 DAY MONEY BACK GUARANTEE
If you are not completely satisfied with the performance of your DeWALT Power Tool, Laser, or 
Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt 
for a full refund – no questions asked.
LATIN AMERICA: This warranty does not apply to products sold in Latin America. For products 
sold in Latin America, see country specific warranty information contained either in the packag-
ing, call the local company or see website for warranty information.
FREE  WARNING  LABEL  REPLACEMENT:  If  your  warning  labels  become  illegible  or  are 
missing, call 1-800-4-DeWALT for a free replacement.
Patent Notification
Manufactured under one of more of the following U.S. patents:
7112942
6954051
6859013
6791300
6747436
6504341
6362596
6133713
6075341
6020721
6008628
5945803
5874825
5642031
5557190
5268630
5144217
6747436
6504341
6500581
D466863
D460413
6362596
6326101
6133713
6075341
6008628
6324339
Other patents may be pending.
FIG. 1
FIG. 2