Nitecore UI2 Charger

The Nitecore UI2 is a portable, dual-slot USB-powered Li-ion battery charger with an LCD display that provides real-time charging information and features automatic detection of battery types. Key features include automatic charging termination, over-discharged battery activation, intelligent charging mode selection, optimized heat dissipation, and protection against reverse polarity and short circuits. It accepts various Li-ion battery sizes and can be powered by a wide range of USB sources.

Specifications
Input: Micro-USB DC 5V / 2A 10W
Output: 4.2V ± 1%
Charging Current: Max 2x 800mA (single slot), or max 1000mA total
Dimensions: Approx. 125mm x 65.2mm x 32mm
Weight: Approx. 40.5g (excluding cables and batteries)
Material: Fire-resistant plastic
Supported Batteries: Many Li-ion/IMR battery sizes, including 18650, 21700, and 16340.

Key Features
Dual-Slot Charging: Charges two batteries simultaneously.
USB-Powered: Can be used with various USB power sources like power banks, solar panels, and USB wall adapters.
Intelligent Charging: Automatically selects optimal charging modes (CC/CV) for the inserted batteries.
LCD Display: Shows real-time charging details, such as current, voltage, and charged volume.
Over-Discharged Battery Activation: Can activate over-discharged protected batteries.
Automatic Termination: Stops charging once a battery is fully charged.
Protections: Includes reverse polarity and short-circuit protection.
Optimized Heat Dissipation: Designed to prevent overheating during charging.

To use the Nitecore UI2 charger, connect it to a power source and insert rechargeable Li-ion, IMR, or LiFePO4 batteries into the slots, ensuring correct polarity. Monitor charging through the indicator lights and remove batteries once full. For safety, only use compatible battery types, unplug when not in use, avoid extreme temperatures, and do not modify the device.

Instructions for Use
1. Connect to Power:
Plug one end of your Micro-USB cable into the UI2’s input port and the other end into a power source, such as a USB adapter, power bank, or solar panel.
2. Insert Batteries:
Place your rechargeable Li-ion, IMR, or LiFePO4 battery into one of the charging slots, making sure the positive (+) and negative (-) ends match the diagrams on the charger.
3. Monitor Charging:
The indicator lights on the charger will show the charging status for each battery slot.
4. Completion:
When a battery is fully charged, the indicator light for that slot will turn off or stop flashing.
5. Remove Batteries:
Unplug the charger and remove the fully charged batteries when not in use.

Safety Precautions
Compatible Batteries Only:
Only charge 3.6/3.7V Li-ion, IMR, and LiFePO4 rechargeable batteries. Charging other types may cause leakage, rupture, or explosion.
Proper Polarity:
Always ensure the battery’s positive and negative ends align with the correct symbols on the charger slots.
Avoid Flammable Surfaces:
Charge batteries in a fireproof or non-flammable area, not on beds, couches, or other combustible surfaces.
Do Not Overcharge:
The charger has an automatic shut-off for full batteries, but it is still recommended to remove batteries once charging is complete.
Unplug When Not in Use:
Always unplug the charger from the power source and remove batteries when the charger is not in use.
Avoid Extreme Conditions:
Do not operate or store the device in extremely high or low temperatures, or in a moist environment.
Ventilated Area:
Store and use the device in a well-ventilated area.
Do Not Disassemble:
Never try to disassemble or modify the charger, as this will invalidate the warranty and could lead to unsafe conditions.
Use Original Power Source:
Use the original power adapter and cord for the charger.