Nitecore UMS2 Intelligent USB Dual Battery Charger

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Nitecore UMS2 Intelligent USB Dual Battery Charger

The UMS2 Intelligent USB Dual Battery Charger by Nitecore implements a total 4000mAh max output between both bays, with support for 18650 / 20700 / 21700 / 26650 and can facilitate the revival of over-discharged IMR and Li-ion batteries. Utilizing a 2A output USB adapter, the Nitecore UMS2 can achieve a max output of 3000mAh for a single battery bay in the "Quick Charge" mode that will be displayed on the LCD screen. In addition, if no changes have been made to the charger or batteries, the charger will enter a energy saving mode that will dim the screen to save electricity. This intelligent design helps set this charger above the rest with automatic detection and real time information fed back to the user.


  • Dimensions - 152mm by 73mm by 38mm
  • Weight - 157g
  • Made from Fire Retardant PC Material
  • Intelligent 2-Bay Battery Charger
  • Independently Charging and Monitoring
  • Manual Battery Charging Settings Available
  • LCD Display Screen
  • Intuitive Battery Life LED Indicator Light
  • Two Button Design
  • Battery Health Detection
  • Automatic Selection Between Three Charging Modes
  • Constant Circuit and Constant Voltage Charging Modes
  • Standard Mode: 2000mA*1 (MAX), 1000mA*2 (MAX)
  • QC: 3000mA*1 (MAX), 2000mA*2 (MAX),
  • Input: DC 5V/2A 9V/2A 18W (MAX)
  • QC 2.0 Input Available
  • Output: 4.35±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
  • Over Charge Protection
  • Over-Discharged IMR Battery Restoration
  • Over-Discharged Li-ion Battery Activation
  • Anti-short Circuit
  • Reverse Polarity Protection
  • Overtime Charging Protection
  • Intelligent Temperature Regulation
  • Unique Cooling Fins
  • Energy Saving Mode
  • Supports Li-ion/IMR/LiFePO4 Battery Size: 10440, 14500, 14650, 16500, 16340, 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26650, 26700
  • Ni-MH/Ni-Cd: AA, AAA, AAAA, C, D
  • Compatible with Car Adapter, USB Adaptor, Power Bank, Solar Panel Input - Not Included
  • Certified by RoHS, CE, FCC, and CEC
  • Insured worldwide by Ping An Insurance (Group) Company of China, Ltd.

To ensure your safety and maintain the battery’s life and durability, we recommend you follow these rules:

  • Do not over-discharge or overcharge the battery. Doing so will shorten the battery’s life and sometimes, it can make it pop or leak.
  • Please do not short circuit or it will release massive current.