Blackcell BU4 USB Charger
BU4 is an intelligent charger, which combines convenience and fast charging into a single unit.
Charging times depend on each batteries current capacity, although the independent output (1A, 2A) and pulse charging circuit are compatible with any cylindrical Li-ion batteries (3.6/3.7v), Ni-MH and Ni-Cd batteries ranging in size between 10440 up to 21700. The BU4’s 3 LED display allows for clear viewing of the current charging status.
|Input Voltage||DC USB5V 2A|
|Output Voltage||1.42V+0.05V, 4.2V+0.05V|
|Charging Mode||constant current and constant voltage|
|Constant voltage cutoff current||<100mA|
|External power supply stand by current||<15.0mA|
|Weight||122.7g (Charger Only)|
|Compatible with||IMR/Li-ion: 26650 22650 18650 18400 18350 17670 17500 18340 14500 10440 21700 20700
Ni-MH/Ni-Cd: AA, AAA, AAAA, C
USB output load voltage: 4.90-5.30V
Output current: 1000mA
Floating current: ＜1mA
When load current is 1000mA, USB output voltage is 4.75-5.25V
Cutoff output protected voltage: 3.0±0.1V
Four, independent micro-controlled charging slots allow for simultaneous charging at 5V DC USB input.
Automatically distributed charging current (500mA*4/1000mA*2/2000mA*1), 2000mA for slot 4 only. 500mA is the default setting for charging Ni-MH and Ni-Cd batteries.
LED display charging status 30%, 70%, 100%.
Li-ion and Ni-MH Ni-Cd batteries are automatically detected.
0V voltage Activation capabilities. Trickle charge activated when the battery voltage is between 1.65-1.85V.
Faulty batteries and battery reverse connected batteries are automatically detected.
Charging mode: constant current and voltage.
DC input, the power supply is 5V 2A (Micro plug).
Automatically detected USB 5V/1000mA output function.
Certified by CE, ROHS, and FCC.
When no batteries are installed, the three LEDs will flash and then turn off one by one when the charger is connected to a power source.
When a bad battery is installed, the three LEDs will flash at the same time.
During the charging process, the three LEDs light up one by one, and will all stay lit until charging is completed.
The product is for use specifically with Lithium, Ni-Cd and Ni-MH batteries only. Charging other batteries can potentially lead to an explosion, broken or leaking batteries, personal injury or property damage.
Incorrect use of the charger may lead to an electric shock.
The BU4 charger should only be used indoors or inside a vehicle. Under no circumstances should it be exposed to water, high humidity, and low or high ambient temperatures.
Do not disassemble or modify the charger.
Please use appropriate AC voltage 100-240V.
No BlackCell products are intended for use by anyone under the age of 18.
The safe operating temperatures are between 0°C-35°C 32°F-95°F.
Do not drop or rest heavy items on the unit.
If any problems arise with either the batteries or charger, unplug the power cord immediately.
The BU4 Charger can be exchanged for a replacement by authorized distributors within 180 days If there are any product issues.
The warranty is invalid in any situation below:
1. The product(s) is/are broken, reconstructed and modified.
2. The product(s) is/are damaged by leakage of batteries.
3. The product(s) is/are damaged by improper use.