Charging Battery Pack - Bosch GAL18V-20 Operating/Safety Instructions Manual

Charger Indicators, symbols and meaning
If the indicator lights are "OFF", the charger is not
receiving power from power supply outlet.
If the green indicator light is "ON",
the charger is plugged in but the
battery pack is not inserted, or the
battery pack is fully charged, or the
battery pack is too hot or cold for fast-charging. The
charger will automatically switch to fast-charging
once a suitable temperature is reached.
Plug charger cord into your standard power outlet.
With no battery pack inserted, the charger's green
indicator light will go ON. This indicates the charger
is receiving power and the charger is ready for
operation.
When you insert the battery pack 1
into the charger. The charger's green
indicator light 3 will begin to "BLINK".
This indicates that the battery is
receiving a fast charge.
The purpose of the rapidly "BLINKING" green light is
to indicate that the battery pack is fast-charging. It
does not indicate the exact point of full charge. The
light will stop blinking when battery is fully charged.
Continuous green battery charger
light 3 indicates that the battery is
fully charged. However, the battery
pack may be used at any time, even
if the green light is still blinking.
A steady green indicator light 3
could also mean that the battery
p a ck i s o u t s i d e t h e p ro p e r
temperature ranges (too hot or too
cold) so the charger will not begin the charging
process. Charging (Fast or long Life Charging Mode)
is only possible when the temperature range of the
battery pack is between 32°F (0°C) and 113°F
(45°C).

Charging Battery Pack

-6-
If the green indicator light is
"BLINKING", the battery pack is
being fast-charged. Fast-charging will
automatically stop when the battery
pack is fully charged.
As soon as the battery pack reaches the correct
temperature range, the battery charger will
automatically switch to fast charging.
If the indicator light 3 is continuous
green, the battery pack cannot
accept a charge. This may be due to
the contacts on the charger or
battery pack being contaminated, the battery pack
itself may be defective, or battery may be wrong
type for this charger.
• Confirm battery compatibility with charger by
checking list of genuine Bosch or AMPShare
battery packs outlined on page 5 of this
manual.
• If applicable, insert another compatible
battery pack into charger to verify charger is
working properly.
• Unplug charger from outlet, clean the
contacts of the charger (e. g. by using a
cotton swab and alcohol on charger terminals
or inserting and removing the battery several
times) or replace the battery pack, as
required.
When the battery pack is fully charged, unplug the
charger (unless you're charging another battery
pack) and slip the battery pack back into the tool.