Bosch 3924 User Manual
74
Charging Battery Pack
(1 Hour Charger)
Plug charger cord into your standard power outlet, then
insert battery pack 1 into charger 2. The charger’s green
indicator 3 will begin to “BLINK”. This indicates that the
battery is receiving a fast charge. Fast-charging will
automatically stop when the battery pack is fully charged.
insert battery pack 1 into charger 2. The charger’s green
indicator 3 will begin to “BLINK”. This indicates that the
battery is receiving a fast charge. Fast-charging will
automatically stop when the battery pack is fully charged.
When the indicator light stops “BLINKING” (and becomes a
steady green light) fast charging is complete.
steady green light) fast charging is complete.
When you begin the charging process of the battery pack, a
steady green light could also mean the battery pack is too
hot or too cold.
steady green light could also mean the battery pack is too
hot or too cold.
The purpose of the 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 in less time if the battery
pack was not completely discharged.
is fast-charging. It does not indicate the exact point of full
charge. The light will stop blinking in less time if the battery
pack was not completely discharged.
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 handle (Fig. 35).
(unless you're charging another battery pack) and slip the
battery pack back into the tool handle (Fig. 35).
Important Charging Notes
1. The battery pack accepts only about 80% of its
maximum capacity with its first few charge cycles.
However, after the first few charge cycles, the battery will
charge to full capacity.
maximum capacity with its first few charge cycles.
However, after the first few charge cycles, the battery will
charge to full capacity.
2. The charger was designed to fast charge the battery only
when the battery temperature is between 40˚F (4˚C) and
105˚F (41˚C).
when the battery temperature is between 40˚F (4˚C) and
105˚F (41˚C).
3. A substantial drop in operating time per charge may
mean that the battery pack is nearing the end of its life and
should be replaced.
mean that the battery pack is nearing the end of its life and
should be replaced.
4. If you anticipate long periods (i.e. a month or more) of non-
use of your tool, it is best to run your tool down until it is fully
discharged before storing your battery pack. After a long
period of storage, the capacity at first recharge will be lower.
Normal capacity will be restored in two or three
charge/discharge cycles. Remember to unplug charger during
storage period.
use of your tool, it is best to run your tool down until it is fully
discharged before storing your battery pack. After a long
period of storage, the capacity at first recharge will be lower.
Normal capacity will be restored in two or three
charge/discharge cycles. Remember to unplug charger during
storage period.
5. If battery does not charge properly:
a. Check for voltage at outlet by plugging in some other
electrical device.
b. Check to see if outlet is connected to a light switch
which turns power “off” when lights are turned off.
c. Check battery pack terminals for dirt. Clean with
cotton swab and alcohol if necessary.
d. If you still do not get proper charging, take or send
tool, battery pack and charger to your local Bosch Service
Center. See “Tools, Electric” in the Yellow Pages for names
and addresses.
Center. See “Tools, Electric” in the Yellow Pages for names
and addresses.
Note: Use of chargers or battery packs not sold by Bosch
may void the warranty.
may void the warranty.
3
1
2
FIG. 35