Nitecore UM2 Intelligent USB Dual Battery Charger

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Nitecore UM2 Intelligent USB Dual Battery Charger

The Nitecore UM2 Intelligent USB Dual Battery Charger is an efficient charger for high-drain vape battery cells of various capacities and sizes (18650 / 20700 / 21700 / 26650) alongside automatic type detection, various inputs, and new restoration mode. The special Restoration Mode that can potentially revive overdrawn or drained Li-ion batteries, extending the life of the batteries. With up to 1500mAh charging speed per slot, the Nitecore UM2 has two bays to automatically detect Li-ion, IMR, Ni-MH, and other various battery types and apply the proper charging settings optimal to maintaining battery health. Furthermore, the Nitecore UM2 has a slew of internal protections to guard against failing or damaging the batteries while also maintaining optimal heat dissipation from the durable and flame retardant PC chassis.


  • Dimensions - 152mm by 73mm by 40mm
  • Weight - 148.3g
  • Made from Fire Retardant PC Material
  • 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
  • Automatic Selection Between Three Charging Modes
  • Constant Circuit and Constant Voltage Charging Modes
  • Standard Mode: 2000mAh Max Output
  • QC Mode: 3000mAh Max Output
  • 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

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.
Customer Reviews
5 Based on 1 Reviews
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A My Vpro Customer
Charles S.
United States United States
Solid, reliable, and handles 21700 batteries

This charger is performing nicely. I bought it because it could comfortably handle my 21700 batteries. They were too snug a fit in my old charger and was constantly having to rewrap them. This charger has a lot of nice features, and I definitely recommend it.