The BU4 vape battery charger is an intelligent device with a fast charging speed and compatible with a wide variety of batteries to cover most charging needs. With a 3 LED light display, it has a clear charging status for each slot, designed for ultimate convenience.

Blackcell BU4 Battery Charger Spec:

• DC USB5V 2A Input Voltage
• 1.42V+0.05V, 4.2V+0.05V Output Voltage
• 500mA x 4/1000mA x 2/2000mA x 1 Output Current
• 5V/1000mA Output USB
• Charging Mode: constant current and constant voltage
• <100mA Constant voltage cutoff current
• <15.0mA External power supply stand by current
• 111x 86x32mm Size
• 122.7g Weight (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
• Input type: USB

Blackcell BU4 Battery Charger USB Output:

• USB output load voltage: 4.90-5.30V
• Output current: 1000mA
• Floating current: ＜1mA
• When load current: 1000mA
• USB output voltage: 4.75-5.25V
• Cutoff output protected voltage: 3.0±0.1V

Blackcell BU4 Battery Charger Features:

• 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.

Blackcell BU4 Battery Charger Precautions:

• 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 Blackcell BU4 Battery Charger Warranty:
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:

• The product(s) is/are broken, reconstructed and modified.
• The product(s) is/are damaged by leakage of batteries.
• The product(s) is/are damaged by improper use.