Nitecore UM4 Intelligent 4-Slot USB-C Charger

What it is and what it does
The Nitecore UM4 is an intelligent USB-C charger with four independent slots designed to charge and manage a variety of rechargeable battery chemistries and sizes. It provides real-time information on an LCD screen and automatically selects charging voltage and mode appropriate to each cell.

Main specifications
From the supplier documentation: output voltage 4.35 V and input voltage 5 V. The manufacturer's product page provides further electrical details: supported output voltages 4.35 V, 4.2 V, 3.7 V and 1.48 V, and maximum output currents specified per slot and per charging mode (for example up to 1,500 mA for a single slot in standard mode, with aggregated limits when multiple slots are used). The housing is made of fire-retardant PC material and the unit is black. Dimensions from the supplier: 10.7 × 10.7 × 4.1 cm (see notices about a discrepancy with the official site).

Compatibility
Compatible with Li-ion/IMR/LiFePO4 and Ni-MH/Ni-Cd cells. The official product information lists supported Li-ion/IMR sizes (including 10440, 14500, 16340/RCR123, 16650, 17350, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700) and Ni-MH/Ni-Cd types AA, AAA, AAAA, C and D.

Package contents and requirements
The manufacturer's package list explicitly mentions a "USB Charging Cable". No other accessories are listed in the consulted product entry; confirm whether a USB-C power adapter is needed or included for your use case.

Functions and safety features
Features include an LCD showing charging status, independent slot control, automatic voltage/mode selection, battery reactivation for deeply discharged cells, Li-ion battery restoration, internal resistance detection and protections against reverse polarity, short circuit and timeout. The product carries RoHS, CE, FCC and CEC references as stated by the manufacturer.

Buyer notes
All data are taken from the supplier and the manufacturer's product page. Please check the notices for discrepancies in dimensions and input voltage if specific power sources or space constraints apply.