The Nitecore UM4 Four Bay USB Battery Charger is an intelligent USB four-slot charger capable of charging 4 batteries simultaneously and controlling each slot independently. 

With automatic detection of battery power levels and automatic selection of the appropriate voltage and charging mode and automatic selection between 3 charging modes (CC, CV and -dV/dt) the UM4 is simple to use. The charging parameters can be set manually to meet your various charging needs.

The UM4 is compatible with 3.6V/3.7V Li-ion rechargeable batteries, 3.8V Li-ion rechargeable batteries, 1.2V Ni-MH/Ni-Cd rechargeable batteries and 3.2V LiFePO4 batteries.

Multiple safeguards ensure the safe charging process, including automatic battery internal resistance detection, anti-short circuiting and reverse polarity protection,  and overtime charging protection.

Please check battery compatibility below before purchasing.

Specs:

• Input: DC 5V/2A V/2A 18W(MAX)
• Output: 4.35V±1%/4.2V±1%/3.7V±1%/1.48V±1%
• QC Mode: 1500mA*1(MAX), 1500mA*2 (MAX), 750mA*4 (MAX)
• Standard Mode: 1000mA*1 (MAX), 1000mA*2 (MAX), 500mA*4 (MAX)
• • Intelligent USB Four-Slot Charger
• QC 2.0 input available
• Capable of charging 4 batteries simultaneously and controlling each slot
  independently
• Up to 1,500mA charging speed in a single slot
• Compatible with Li-ion and Ni-MH/Ni-Cd batteries with automatic detection
• Automatic detection of battery power level and automatic selection of the
  appropriate voltage and charging mode (LiFePO4 and 3.8V Li-ion batteries
  excluded)
• Automatic selection between 3 charging modes (CC, CV and -dV/dt)
• Energy-efficient LCD display for real-time charging information
• Capable of manually selecting the charging cut-off voltage and the charging
  current
• Automatic detection of large/small capacity batteries and automatic selection
  of appropriate charging current
• Automatic termination upon charging completion
• Reverse polarity protection and short circuit protection
• Over-discharged battery activation
• Li-ion battery restoration
• Overtime charging protection
• Automatic detection of battery internal resistance and display of battery health
• Made from durable and fire-retardant PC materials
• Optimal heat dissipation design

Compatible with:

• IMR / Li-ion / LiFePO4:
• 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
• Ni-MH / Ni-Cd:
• AA, AAA, AAAA, C, D

What's in the box:

• 1 x Nitecore UM4 Four Bay USB Battery Charger
• 1 x USB Cable
• 1 x User Manual

*Does not include batteries. Batteries in images are for illustration purposes only.