A
B
C
Figure 4: Battery Pack (CTB8185)
A – Terminal
B – Latch Button
C – Fuel Gauge
L1
Figure 5: Fuel Gauge (CTB8185)
L1 - Solid Light 25% Charge
L2 - Solid Light 50% Charge
L3 - Solid Light 75% Charge
L4 - Solid Light 100% Charge
Battery Pack
Fuel Gauge
Press the fuel gauge button, the display lights will light
up and show the battery pack's remaining capacity. The
lights stay on for 5 seconds.
Note: If fuel gauge L1 is flashing, charge the battery
pack.
Charge Cycle Counter
Press the fuel gauge button for ten (10) seconds to read
the charge cycle counter.
Count number of flashes to figure out cycle count.
ZCTBTS9050
L2
L3
L4
Example 1:
L1 - Flashes one (1) time
L2 - Flashes three (3) times
L3 - Flashes four (4) times
L4 - Solid Light 100% ChargeL4 - Flashes five (5)
times
It means battery was charged 1, 345 times
Example 2:
L1 - No flashes
L2 - Flashes six (6) times
L3 - Flashes seven (7) times
L4 - Flashes eight (8) times
It means battery was charged 678 times
Battery Pack Protection
To maximize performance and battery life, the Lithium-
Ion battery's protection circuit monitors battery voltage,
discharge amperage and temperature. When the battery
voltage falls below the usable range, the battery will shut
off, and the 1st LED will flash for ten (10) seconds. The
battery needs charging. If the battery's discharge
amperage limit is reached, due to excessive load, the
protection circuit will shut down the tool and the
illumination LED will remain on until the trigger is
released. Tool operation can be resumed immediately.
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).
8
(04/19)