Product Description
The NITECORE UMS4 is a premium 4-slot intelligent battery charger designed for enthusiasts and professionals managing multiple batteries. It features a USB-C input supporting QC 2.0 fast charging (up to 18W) and delivers a powerful 3000mA maximum output for a single slot. The high-definition LCD screen provides comprehensive real-time data, including charging current, voltage, and internal resistance, enabling accurate battery health assessment (Good/Poor). With adjustable charging voltages (4.35V, 4.2V, 3.7V, 1.48V), it supports a wide range of chemistries, including standard 3.6V/3.7V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH/Ni-CD. Built-in IMR repair, over-discharge activation, and PC flame-retardant materials ensure safety and longevity.
Key Features
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3000mA Fast Charge & QC 2.0 Support: Single slot max 3000mA output. Supports 5V/2A, 9V/2A, 12V/1.5A QC 2.0 input (18W max).
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Real-time LCD Monitoring & IR Health Test: HD LCD displays voltage, current, charged capacity, and internal resistance. Automatically grades battery health as "Good" or "Poor".
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Adjustable Multi-Voltage & Multi-Chemistry Support: Selectable output voltages (4.35V, 4.2V, 3.7V, 1.48V) for 3.6V/3.7V Li-ion, 3.2V LiFePO4, IMR, and 1.2V Ni-MH/Ni-CD batteries.
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IMR Battery Repair & Activation: Displays "EEEE" for over-discharged IMR cells; long-press "V" to repair. Automatically activates over-discharged protected Li-ion batteries.
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4 Independent Slots: Supports simultaneous mixed charging of different battery types and sizes, with independent circuits.
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Advanced Safety & Cooling: PC flame-retardant material, unique cooling fins, intelligent temperature control, over-charge timeout protection, reverse polarity and short-circuit protection (flashing "EE").
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Energy-Saving Mode: LCD screen automatically dims after 3 minutes of inactivity.
Product Parameters
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Brand: NITECORE
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Model: UMS4
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Input Voltage: DC 5V/2A, 9V/2A, 12V/1.5A (Max 18W, USB-C)
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Output Voltage: 4.35V ±1%, 4.2V ±1%, 3.7V ±1%, 1.48V ±1%
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Output Current: 3000mA1 (Max), 2000mA2 (Max), 1000mA*4 (Max)
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Dimensions: 159 x 107 x 41 mm
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Net Weight: 255.4g (excluding cable)
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Supported Battery Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR), 3.2V / 3.3V LiFePO4, 1.2V Ni-MH / Ni-CD
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Supported Li-ion/IMR/LiFePO4 Sizes: 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
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Supported Ni-MH/Ni-CD Sizes: AA, AAA, AAAA, C, D
Applications
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Professional maintenance and health diagnosis for high-end EDC tactical flashlights.
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Simultaneous mixed-charging station for managing multiple household electronics batteries (Li-ion, LiFePO4 & Ni-MH).
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Customizable charging for LiFePO4 batteries in DIY power stations and solar projects.
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Outdoor power hub for camping gear, utilizing solar panel or mobile power USB-C input.
Frequently Asked Questions (FAQ)
Q1: Does the UMS4 support 21700 batteries?
A1: Yes, the UMS4 is fully compatible with 21700 batteries, as well as larger cells like 26650 and 26700.
Q2: How does the battery health monitoring function work?
A2: Once a battery is inserted, the charger automatically performs an internal resistance test. The screen will display the resistance value in mΩ and indicate the health status as "Good" (resistance < 250mΩ) or "Poor" (resistance > 250mΩ), helping you identify aged or degraded cells.
Q3: What is the IMR battery repair function?
A3: If you insert an over-discharged IMR battery, the screen will display "EEEE" to indicate it needs repair. You can long-press the "V" button to enter repair mode, and once complete, it will automatically switch to the normal charging mode.
Q4: Can I charge LiFePO4 batteries with the UMS4?
A4: Yes, the UMS4 fully supports 3.2V/3.3V LiFePO4 batteries. It offers adjustable charging voltages, allowing you to select the appropriate profile based on the specific cell requirements.
Q5: What do the flashing "EE" error messages indicate?
A5: The flashing "EE" on the display indicates a reverse polarity connection or a short circuit. Please immediately remove the battery, check for correct polarity, and reinsert it properly to resume safe charging.
