Important Charging Notes - DeWalt DXH12B Instruction Manual

Charger Operation
Refer to the indicators below for the charge status of the battery pack.
* The red light will continue to blink, but a yellow indicator light will be illumi-
nated during this operation. Once the battery pack has reached an appropri-
ate temperature, the yellow light will turn off and the charger will resume the
charging procedure.
The charger will not charge a faulty battery pack. The charger will indicate faulty
battery pack by refusing to light.
NOTE: This could also mean a problem with a charger.
If the charger indicates a problem, take the charger and battery pack to be
tested at an authorized service center.
HOT/COLD PACK DELAY
When the charger detects a battery pack that is too hot or too cold, it auto-
matically starts a Hot/Cold Pack Delay, suspending charging until the battery
pack has reached an appropriate temperature. The charger then automatically
switches to the pack charging mode. This feature ensures maximum battery
pack life.
A cold battery pack will charge at a slower rate than a warm battery pack. The
battery pack will charge at that slower rate throughout the entire charging cycle
and will not return to maximum charge rate even if the battery pack warms.
LITHIUM-ION BATTERY PACKS ONLY
Li-Ion tools are designed with an Electronic Protection System that will protect
the battery pack against overloading, overheating or deep discharge.
The tool will automatically turn off if the Electronic Protection System engages.
If this occurs, place the lithium-ion battery pack on the charger until it is fully
charged.

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 +104 °F (+40 °C). This is important and will prevent
serious damage to the battery pack.
2. The charger and battery pack may become warm to the 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 unin-
sulated trailer.
3. If the battery pack does not charge properly:
• Check operation of the receptacle by plugging in a lamp or other
appliance;
• Check to see if the receptacle is connected to a light switch which turns
the power off when you turn out the lights;
• Move the charger and battery pack to a location where the surrounding
air temperature is approximately 65 °F – 75 °F (18° – 24 °C);
• 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 it under these conditions. Follow the charging procedure. You may also
charge a partially used pack whenever you desire with no adverse effect on
the battery pack.
5. Foreign materials of a conductive nature such as, but not limited to, grind-
ing dust, metal chips, 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 the charger before attempting to clean it.
6. Do not freeze or immerse the charger in water or any other liquid.
WARNING: Shock hazard. Don't allow any liquid to get inside the charger.
Electric shock may result.
WARNING: Burn hazard. Do not submerge the battery pack in any liquid or
allow any liquid to enter the battery pack. Never attempt to open the bat-
tery pack for any reason. If the plastic housing of the battery pack breaks or
cracks, return it to a service center for recycling.
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