The green LED will ash indicating that the battery is being 
charged.
The completion of charge is indicated by the green LED 
remaining on continuously. The pack is fully charged and 
may be used at this time or left in the charger
Warning! Recharge discharged batteries as soon as pos-
sible after use or battery life may be greatly diminished.
Charger diagnostics
This charger is designed to detect certain problems that can 
arise with the battery packs or the power source. Problems 
are indicated by one LED ashing in different patterns.
Bad Battery
The charger can detect a weak or damaged battery. The 
red LED ashes in the pattern indicated on the label. If you 
see this bad battery blink pattern, do not continue to charge 
the battery. Return it to a service centre or a collection site 
for recycling
Hot/Cold Pack Delay
When the charger detects a battery that is excessively 
hot or excessively cold, it automatically starts a Hot/Cold 
Pack delay, suspending charging until the battery has 
normalised. After this happens, the charger automatically 
switches to the Pack Charging mode. This feature ensures 
maximum battery life. The red LED ashes in the pattern 
indicated on the label when the Hot/Cold pack delay is 
detected.
Problem Power Line
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. 
The  LED ashes in the pattern indicated on the label. This 
indicates that the power source is out of limits.
Leaving the battery in the charger
The charger and battery pack can be left connected with the 
LED glowing indenitely. The charger will keep the battery 
pack fresh and fully charged.
Important charging Notes
u  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.
u  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.
u  If the battery pack does not charge properly:
u  Check current at receptacle by plugging in a lamp or 
other appliance. 
u  Check to see if receptacle is connected to a light switch 
which turns power off   when you turn out the lights.  
u  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 Stanley 
Fat Max service center.
u  The battery pack should be recharged when it fails to 
produce sufcient power on jobs which were easily done 
previously. 
u  DO NOT CONTINUE to use under these conditions. Fol-
low the charging procedure. 
u  You may also charge a partially used pack whenever you 
desire with no adverse affect on the battery pack.
Installing and Removing the Battery Pack from the 
tool
Warning! Make certain the lock-off button is engaged to 
prevent switch actuation before removing or installing battery.
To install battery pack
u  Insert battery pack rmly into tool until an audible click is 
heard as shown in gure A. Ensure battery pack is fully 
seated and fully latched into position.