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Nitecore UM4 User Manual

Nitecore UM4
4 pages
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UM4
Automatic and High-Speed Charging
Real-time Information Display
Over-Discharged Li-ion Battery Activation
and IMR Battery Restoration
Intelligent USB
Four-Slot Charger

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Nitecore UM4 Specifications

General IconGeneral
Suitable forHousehold battery
Power source typeDC
Compatible productsIMR/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
Compatible battery sizesAA, AAA, AAAA, C, D
Number of batteries supported4
Compatible battery technologiesLithium Iron Phosphate (LiFePo4), Lithium-Ion (Li-Ion), Nickel-Cadmium (NiCd), Nickel-Metal Hydride (NiMH)
Input voltage9 V
Output voltage4.35 V
Product colorBlack
Batteries includedNo
Quantity per pack1 pc(s)

Summary

Nitecore UM4 Charger Overview

Product Features and Specifications

Key Features of the UM4 Charger

Lists intelligent USB charging, QC 2.0 input, independent slot control, high speed charging, and automatic detection.

Included Accessories

Details the accessories provided with the charger, such as the USB charging cable.

Technical Specifications

Covers input/output, charging modes, compatible batteries, dimensions, and weight.

User Operating Instructions

Connecting to Power and Inserting Batteries

Guide on connecting the charger to a power source and inserting batteries correctly.

Battery Inspection and Error Handling

Explains how the charger detects battery issues like reverse polarity or short circuits.

Charging Modes and Settings

Details automatic and manual settings for charging current, voltage, and modes.

Advanced Charging Functions

Covers battery activation, IMR restoration, internal resistance detection, and overtime protection.

General Precautions for Safe Use

Lists essential safety warnings and operating guidelines for the charger and batteries.

Lithium-ion Battery Safety Guidelines

Charging Voltage Requirements

Specifies correct charging voltages for 3.7V, 3.8V Li-ion, and 3.2V LiFePO4 batteries.

Charging Current Recommendations

Advises on selecting appropriate charging currents (1C rule) to prevent battery damage.

Safety Precautions for Lithium Batteries

Highlights critical safety points like avoiding short circuits and over-discharge.

Long-term Battery Storage

Provides guidance on optimal storage voltage for rechargeable lithium batteries.

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