Nitecore UM20 Charger


The world’s only USB and Li-Ion battery digital charger. Ideal for charging your phone and batteries at the same time while travelling.

The UM20 is compatible with Li-ion and IMR cylindrical rechargeable batteries only. Intelligent charging circuitry selects the optimal charging mode (CC, CV and dV/dt) for a given battery and each of the UM20’s two microcomputer-controlled charging slots then monitors and charges the battery independently.

An integrated digital LCD screen clearly displays charging progress while an intelligent automatic power-off function terminates current when charging is complete.

USB output charging and data transfer lets you work or charge your phone and battery at the same time, perfect for travellers working on laptops and at charging stations. A rear USB cable winder keeps everything neat and tidy.


• USB output charging and USB data transfer
• Rear USB cable winder
• Made of durable ABS fire retardant material so it will not catch fire
• Metal sliders to reduce wear and tear when inserting batteries
• Capable of charging 2 batteries simultaneously
• Each of the two battery slots monitors and charges independently
• Optimized charging design for IMR batteries
• Automatically detects battery status and selects the appropriate voltage and charge mode
• LED displays charging progress for each battery
• Automatically stops charging when complete
• Features over-charge prevention to protect batteries
• Features reverse polarity protection
• Designed for optimal heat dissipation
• Certified by RoHS, CE, FCC, CEC and KC
• Insured worldwide by Ping An Insurance (Group) Company of China, Ltd.

What’s in the box

  • UM20 Charger
  • USB Cable
  • Instruction sheet
Input voltage Micro USB DC 5V
Output voltage 4.2V ±1% / 5V
Output current 1000mA / 500mA
Length 100mm
Width 56mm
Height 35mm
Weight 77.2g (without batteries and power cord)
Compatible with
Li-ion / IMR: 18650, 18490, 18350, 17670, 17500, 16340(RCR123), 14500, 10440

Out of stock

SKU: accnitecoreum20 Category: