Blackcell BU1 USB Charger

The Blackcell BU1 is the ultimate all-in-one charging solution for your workbench and field bag. This intelligent, single-bay charger automatically detects and charges a huge variety of cylindrical batteries, from the 18650s in your FPV goggles to the AAAs in your gear. Its standout feature is the integrated USB output, which allows you to use a charged Li-ion battery to turn the BU1 into a portable power bank for your phone, GoPro, or other devices.

Universal Smart Charging The BU1’s automatic detection system can identify Li-ion, Ni-MH, and Ni-Cd batteries and select the optimal charging mode for each. It offers a fast $2\text{A}$ charge current for Li-ion cells and includes a 0V activation feature that can revive and trickle-charge batteries that have been deeply discharged. A clear three-LED display shows the current charging status at a glance.

Portable Power Bank: Need to top off your phone in the field? Simply insert a charged Li-ion battery (like an 18650 or 21700), and the BU1 becomes a powerful $5\text{V}/1\text{A}$ USB power bank. It’s the perfect multi-purpose tool for any FPV pilot or electronics enthusiast.

Key Features:

• Universal Compatibility: Charges a massive range of Li-ion, Ni-MH, and Ni-Cd batteries, including 18650, 21700, AA, and AAA.
• Power Bank Function: Use a charged Li-ion cell to output $5\text{V}/1\text{A}$ power via the USB-A port.
• Fast & Smart Charging: Selectable $1\text{A}$ or $2\text{A}$ charge current for Li-ion and intelligent battery type detection.
• 0V Activation: A trickle charge feature can revive over-discharged Li-ion batteries that other chargers would reject.
• Comprehensive Safety Protections: Integrated overcharging, overheating, overvoltage, reverse polarity, and faulty battery protection.
• Clear LED Display: Three LEDs clearly display the current charging status and remaining power.

Specifications

• Input: Micro USB DC $5\text{V }2\text{A}$
• Output Voltage: $1.48\text{V}$ (Ni-MH/Ni-Cd), $4.2\text{V}\pm 0.01\text{V}$ (Li-ion)
• Output Current: $500\text{mA}$ (Ni-MH/Ni-Cd), $1000\text{mA}/2000\text{mA}$ (Li-ion)
• USB Output: $5\text{V}/1000\text{mA}$
• Weight: $58.5\text{g}$
• Compatible with:
  • IMR/Li-ion: 20700, 21700, 26650, 22650, 18650, 18490, 18350, 17670, 17500, 16340(RCR123), 14500, 10440
  • Ni-MH/Ni-Cd: AA, AAA, AAAA, C

Precautions

• This charger should only be used with compatible Li-ion, Ni-MH, and Ni-Cd batteries.
• Use indoors or inside a vehicle; do not expose to water or high humidity.
• The safe operating temperature is between 0∘C and 35∘C.
• If any problems arise, unplug the power cord immediately.

Includes

• 1x Blackcell BU1 Smart Charger
• 1x Micro USB Cable
• 1x User Manual