Product Description
The NITECORE UMS2 is a highly advanced 2-slot smart battery charger designed for professionals and enthusiasts who demand precision and reliability. Equipped with a bright LCD display, it provides real-time monitoring of charging current, battery voltage, charged capacity, and even internal resistance to assess battery health. Supporting USB-C input with QC fast charging (up to 18W), it delivers a remarkable 3000mA maximum output for a single slot. The UMS2 features a customizable charging mode with adjustable voltages (4.35V, 4.2V, 3.7V, 1.48V) to accommodate a wide range of battery chemistries, including standard 3.6V/3.7V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH/Ni-CD. It also includes an IMR battery repair function and an over-discharged battery activation feature. Built with flame-retardant PC materials and intelligent temperature control, the NITECORE UMS2 is the ultimate smart charging solution for your high-performance devices.
Key Features
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3000mA Ultra-Fast Charging & QC Support: In fast charge mode, it provides up to 3000mA for a single slot and 2000mA per slot for two slots. Features a USB-C port that supports QC fast charging (5V/2A, 9V/2A, up to 18W), ensuring quick power replenishment.
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Real-Time LCD Monitoring & Battery Health Test: The high-definition LCD screen displays real-time charging current, voltage, charged capacity, and battery type. It also performs an automatic internal resistance (IR) test to assess battery health, displaying "Good" or "Poor" status on the screen.
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Adjustable Multi-Voltage & Multi-Chemistry Support: Offers adjustable charging voltages (4.35V, 4.2V, 3.7V, 1.48V) to support a wide range of battery types, including high-voltage 3.6V/3.7V Li-ion, IMR, 3.2V LiFePO4, and 1.2V Ni-MH/Ni-CD batteries.
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IMR Battery Repair & Activation Functions: Features a dedicated repair mode for over-discharged IMR batteries (indicated by "EEEE" on the display). Simply long-press the "V" button to start the repair process. It also automatically activates over-discharged Li-ion batteries with protection circuits.
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Safety Protections & Smart Cooling: Built with premium PC flame-retardant material and a unique cooling fin design. It features full-automatic intelligent temperature control, overcharging timeout protection, reverse polarity and short-circuit protection (indicated by flashing "EE").
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Energy-Saving Mode: The LCD screen automatically dims after 10 minutes of inactivity to save power and reduce eye strain in dark environments.
Product Parameters
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Brand: NITECORE
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Model: UMS2
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Input Voltage: DC 5V/2A, 9V/2A (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 (Fast Mode): 3000mA1 (Max), 2000mA2 (Max)
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Output Current (Standard Mode): 2000mA1 (Max), 1000mA2 (Max)
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Dimensions: 152mm x 73mm x 40mm
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Net Weight: 157.7g (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 battery management and health diagnosis for high-performance EDC tactical flashlights and searchlights.
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Advanced charging and repair for 18650/21700 batteries used in high-wattage electronic cigarettes.
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Reliable outdoor charging station for camping gear, solar panels, and power banks via USB-C input.
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Customizable charging and testing for LiFePO4 batteries in DIY power stations and solar projects.
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A high-precision charging hub for maintaining AA/AAA Ni-MH batteries for household electronics.
Frequently Asked Questions (FAQ)
Q1: Does the UMS2 support 21700 batteries?
A1: Yes, the UMS2 is fully compatible with 21700 batteries, as well as larger cells like 26650 and 26700, thanks to its extended slot design.
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" or "Poor", 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 UMS2?
A4: Yes, the UMS2 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.
