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5. The charger will not charge if the battery pack is too hot
or too cold. The charger will show a flashing yellow LED
and wait until the battery temperature is between 32°F
(0°C) and 113°F (45°C) to begin fast charging.
6. Standard fast charging time is 30 minutes. Charger may
take longer than 30 minutes. The charge cycle may be
longer if the battery has been left in a low state of charge
for an extended period of time. When the charge is
complete, all 4 green LED's stay illuminated.
Battery
Pack
CTB8172
CTB8174
7. A flashing red LED indicates the battery is faulty and the
charger will not charge. Remove the battery from the
charger and replace the battery.
Battery Pack - CTB8172/
CTB8174
Battery Pack Protection
To maximize performance and battery life, the Lithium-
Ion battery is protected by safety circuits in the tool and
the charger. They monitor battery voltage, discharge/
charge amperage and temperature. See overloading
section of this manual for more information.
Cold Weather Operation
The Lithium-Ion battery can be used in temperatures
down to -4°F(-20°C). When the battery pack is very cold,
run the tool at no load to warm battery and then use the
tool normally.
Hot Weather Operation
If the Lithium-Ion battery temperature reaches
158°F(70° C), the protection circuit will turn off the
battery and all four LED's will flash for four (4) minutes.
Once the battery has cooled down below 149°F(65°C),
the battery will resume normal operation.
Storage
Do not expose your battery pack to water or rain; this
could damage the battery pack.
Fully charge the battery before placing it in storage. For
optimum life, store the all Lithium-Ion batteries at room
temperature away from moisture. Permanent capacity
loss can result if batteries are stored for a long period at
high temperature, over 120°F(49°C).
ZCTLU861CE Rev B
CTC772A/CTCA772A/
CTCEU772A/CTCJ772A
Charger
~ 55 min
~ 70 min
Maintenance
Service
Service of a light requires extreme care and knowledge.
Service should be performed only by a qualified service
technician.
• Always check light for damaged parts before use.
• Replace or repair damaged parts before use. Check
alignment of moving parts. Binding of moving parts or
broken parts may alter operation.
• Have damaged parts properly repaired or replaced by an
Authorized Service Center.
• Do not use light if switch does not turn it on and off.
• Maintain light. Keep lights dry, clean and free of oil and
grease for better and safer performance.
• For the location of the nearest Snap-on repair center, call
Snap-on customer service at 1-877-762-7664.
Northern Repair Center
Crystal Lake IL 60014
(Outside North America)
Refer to address on Declaration of Conformity
• When charging or discharging a lithium-ion battery over
a short period of time, the internal temperature of the
battery pack increases substantially. This is normal.
• Under ideal working conditions the useful life of a lithium-
ion battery pack is around 1000 charge/discharge cycles.
Improper care and maintenance shortens battery life and
the amount of time the battery holds a charge.
• Use only with Snap-on charging equipment that
specifies a CTB series battery pack.
• Avoid short circuiting the battery pack. Permanent
damage to the pack can occur from high current
discharge.
9
(North America Only)
3011 E Route 176
(10/20)
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