Nitecore UM2 dual-slot USB-C fast charger with LCD display charging two 18650 batteries side by side.

Nitecore UM2 charger compatible battery types including 18650, 21700, 26650, AA, AAA, and NiMH/NiCd cells.

Nitecore UM2 LCD display showing 2A fast charging current and USB-C power input connection.

Nitecore UM2 built-in safety protections – overcharge, overcurrent, short circuit, reverse polarity, and temperature control.

Nitecore UM2 charger dimensions – compact 150mm x 75mm x 38mm lightweight design.

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NITECORE UM2 2-Slot Smart Battery Charger with LCD Display – QC/PD Fast Charging for 18650, 21700, 26650 Li-ion Batteries

Name: NITECORE UM2 2-Slot Smart Battery Charger with LCD Display – QC/PD Fast Charging for 18650, 21700, 26650 Li-ion Batteries
Brand: Nitecore
SKU: OAS1353
Price: 39.98 USD
Availability: InStock

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Product Description

The NITECORE UM2 is a premium intelligent dual-slot USB-C battery charger designed for safety, speed, and versatility. Whether you are a professional flashlight user, an outdoor enthusiast, or a DIY electronics builder, the UM2 delivers unparalleled charging performance.

Equipped with a high-definition LCD display, the UM2 allows you to monitor real-time charging status, including battery voltage, charging current, charged capacity, and elapsed time. It supports QC 2.0 fast input and provides a maximum output of 1500mA per slot (3000mA total).

The UM2 is not just a charger—it’s a battery life saver. It features IMR battery repair and activation functions, helping you revive over-discharged lithium batteries. With multiple safety protections, including reverse polarity, short-circuit prevention, and a built-in intelligent temperature control system, your batteries are always in safe hands.

Key Features

Intelligent Dual-Slot Charging: Two independent charging slots with a total output of 3000mA (1500mA per slot).
High-Definition LCD Display: Real-time monitoring of charging current, voltage, capacity, and time. The screen automatically dims after 10 minutes to save power.
QC 2.0 Fast Charging: Supports Quick Charge 2.0 input for significantly reduced charging times.
Battery Activation & Repair: Automatically detects and activates over-discharged IMR/Li-ion batteries. Displays "EE" when a battery is beyond repair.
3 Charging Modes: Automatically selects CC (Constant Current), CV (Constant Voltage), and -dV/dt (for NiMH/NiCd) modes based on battery chemistry.
Manual Setting: Long-press the "C" button to manually adjust charging voltage (3.7V/4.2V/4.3V) and current (100mA ~ 1500mA).
USB-C Input: Powered via USB-C, compatible with power banks, solar panels, USB adapters, and laptops.
Advanced Safety Protection: Features reverse polarity protection, short-circuit protection, overcharge cut-off, and full-automatic smart temperature control.
Unique Heat Dissipation Design: Built-in cooling fins on both sides ensure stable charging by preventing heat buildup.
Fire-Resistant Material: Manufactured with PC flame-retardant materials for maximum safety.

Parameters (Specifications)

Weight148.3g (5.23oz) (Without charging cable)



Parameter	Specification
Input Voltage	DC 5V/2A, 9V/2A (QC 2.0)
Input Power	18W (Max)
Output Voltage	4.35V ±1% / 4.2V ±1% / 3.7V ±1% / 1.48V ±1%
Output Current	Fast Charge Mode: 1500mA × 2 (Max)



Standard Mode: 1000mA × 2 (Max)	Compatible Batteries (Li-ion)	3.6/3.7V IMR/Li-ion/3.2V LiFePO4: 10440, 14500, 14650, 16500, 16340, 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700	Compatible Batteries (NiMH/NiCd)	1.2V AA, AAA, AAAA, C, D	Dimensions	152mm × 73mm × 40mm (5.98" × 2.87" × 1.57")

Applications

Everyday Carry (EDC): Perfect for charging 18650 and 21700 batteries used in high-performance flashlights and headlamps.
Outdoor Adventures: USB-C input allows you to charge batteries via solar panels or power banks during camping, hiking, or emergency situations.
DIY Electronics & Power Banks: Ideal for hobbyists building custom battery packs or using NiMH/NiCd cells for RC devices.
Industrial & Professional Use: Reliable charging for cordless power tools, security cameras, and medical devices.

FAQ

Q1: What is the difference between Fast Charge Mode and Standard Mode?
A: In Fast Charge Mode, the UM2 outputs 1500mA per slot for faster charging (up to 18W total). In Standard Mode, it outputs 1000mA per slot, which is gentler on batteries and suitable for overnight charging.

Q2: What does the "EE" error display mean?
A: The "EE" display indicates that the battery is either damaged, has a short circuit, or is over-discharged beyond the safe repair threshold. For over-discharged IMR batteries, you can long-press the "V" button to attempt repair mode.

Q3: Can I charge NiMH and Li-ion batteries at the same time?
A: Yes, the UM2 has two independent slots. You can charge different battery chemistries (Li-ion, NiMH, NiCd) simultaneously without interference.

Q4: Does the UM2 support USB-C to USB-C charging?
A: Yes, the UM2 uses a USB-C port. You can power it using a standard USB-C cable connected to a compatible QC 2.0 wall adapter, power bank, or laptop.

Q5: How long does it take to charge a 3500mAh battery?
A: In Fast Charge Mode (1500mA), charging a 3500mAh battery to 80% takes approximately 2 hours.

Free Shipping: Enjoy free shipping on all orders over $65. For orders under $65, the shipping cost is $8.99.
Delivery Time: Once shipped, orders typically arrive within 7–15 business days.
Easy Returns: We want you to be completely satisfied. If you're not, you can return your product within 30 days of receiving your order. Please ensure the items are unused and in their original condition. For return instructions, please contact our support team.

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NITECORE UM2 2-Slot Smart Battery Charger with LCD Display – QC/PD Fast Charging for 18650, 21700, 26650 Li-ion Batteries

Description

Product Description

Key Features

Parameters (Specifications)

Applications

FAQ

Shipping and Returns

Payment & Security

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