Nitecore UM4 Intelligent USB Four Battery Charger

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Nitecore UM4 Intelligent USB Four Battery Charger

The Nitecore UM4 Intelligent USB Four-Slot Battery Charger is an exemplary charger, support various vape battery compositions and sizes (18650 / 20700 / 21700 / 26650) with quick and fast charge that preserves battery health and longevity and a total 3000mAh max charging output. With an included battery restoration mode, the UM4 can detect and revive over-discharged Li-ion and IMR batteries. Built from flame retardant PC materials, the UM4 is a durable and strong charger, delegating 3000mAh charging speeds across the four battery bays either in standard or quick charge mode. Optimized for IMR batteries, this charger is compatible with a slew of power options and can accept power from outlets, power banks, and solar panels. Given the flexibility of this charger, the UM4 is ready for any use and application.


  • Dimensions - 159mm by 107mm by 41mm
  • Weight - 232.6g
  • Made from Fire Retardant PC Material
  • Intelligent 4-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: 1500mA*1 MAX, 1000mA*2 (MAX), 500mA*4(MAX)
  • QC: 1500mA*1 (MAX), 1000mA*2 (MAX), 750mA*4 (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.