1. Ifihan
The Nitecore UMS2 is an intelligent USB dual-slot quick battery charger designed for a wide range of rechargeable batteries, including Li-ion, IMR, LiFePO4, Ni-MH, and Ni-Cd. It features an LCD display for real-time charging information, intelligent charging mode selection, and multiple safety protections. This manual provides detailed instructions for safe and efficient use of your UMS2 charger.

Image 1.1: Nitecore UMS2 Intelligent USB Dual-Slot Quick Battery Charger with its accompanying battery organizer.
2. Awọn ẹya Ọja
- Intelligent USB dual-slot charger capable of charging two batteries simultaneously and controlling each slot independently.
- QC 2.0 input available, enabling a total maximum output of 4000mA.
- Single slot maximum output of 3000mA for rapid charging.
- Compatible with Li-ion, IMR, LiFePO4, Ni-MH, and Ni-Cd batteries with automatic detection.
- Automatic detection of battery power level and selection of appropriate voltage and charging mode (LiFePO4 and 3.8V Li-ion batteries excluded).
- Automatic selection between 3 charging modes: Constant Current (CC), Constant Voltage (CV), and -dV/dt.
- Energy-efficient LCD display for real-time charging information.
- Ti o lagbara pẹlu yiyan yiyan gbigba agbara gige voltage ati gbigba agbara lọwọlọwọ.
- Automatic detection of large/small capacity batteries and automatic selection of appropriate charging current.
- Automatic termination upon charging completion.
- Reverse polarity protection and short circuit protection.
- Over-discharged battery activation and Li-ion battery restoration.
- Idaabobo gbigba agbara akoko aṣerekọja.
- Automatic detection of battery internal resistance and display of battery health.
- Made from durable and fire-retardant PC materials.
- Ti aipe ooru wọbia oniru.
- Multiple input sources available: USB Adapter, Power Bank, Solar Panel.

Image 2.1: Detailed list of Nitecore UMS2 charger features and specifications.
3. Eto
- Asopọ agbara: Connect the UMS2 charger to a power source using a USB cable. The charger supports DC 5V/2A or 9V/2A (QC 2.0+) input. The LCD display will illuminate upon successful connection.
- Gbigbe Batiri sii: Insert compatible rechargeable batteries into the charging slots. Ensure correct polarity (+/-) as indicated on the charger. The UMS2 will automatically detect the battery type and begin charging.

Image 3.1: The Nitecore UMS2 charger supports multiple input sources including USB adapters, power banks, and solar panels.
4. Awọn ilana Iṣiṣẹ
4.1. LCD Ifihan Alaye
The UMS2 features an intelligent LCD display that provides real-time charging status and battery information. The display shows:
- CHG. STATUS: Current charging status (e.g., charging, full).
- Gbigba agbara kiakia: Indicates if Quick Charge mode is active.
- CHG. MODE: Current charging mode (CC, CV, -dV/dt).
- Iru Batiri: Detected battery chemistry (Li-ion, LiFePO4, NiMH/NiCd).
- Ge-pipa Voltage: Awọn afojusun voltage for the battery type.
- Charged Volume (mAh): Amount of charge delivered.
- Akoko gbigba agbara: Duration of the current charging cycle.
- Charged Current (mA): Current charging rate.
- Batiri Voltage (V): Real-akoko batiri voltage.
- Agbara inu (mΩ): Displays the battery's internal resistance.
- Ilera Batiri: Indicates the overall health status of the battery (Good/Poor).

Image 4.1: The LCD display of the Nitecore UMS2 provides comprehensive real-time charging information.
4.2. Cycling Through Information
Kukuru tẹ awọn V button to cycle through the different charging information displayed on the LCD screen for the selected slot.
4.3. Manual Charging Settings
The UMS2 allows for manual adjustment of charging voltage and current for specific battery types.
- Ngba agbara Voltage Aṣayan: The charger supports 4.3V, 4.2V, and 3.7V cut-off voltages.
- Charging Current Selection: A le ṣatunṣe lati 100mA si 3000mA.

Image 4.2: The Nitecore UMS2 allows for manual selection of charging voltage ati lọwọlọwọ.
4.4. IMR Battery Charging Program
The UMS2 features a specialized charging program for IMR batteries. This program monitors the entire charging process to ensure the cut-off voltage remains within safe limits, thereby extending the lifespan of the batteries.
5. Batiri ibamu
The Nitecore UMS2 is compatible with a wide range of cylindrical rechargeable batteries:
- Li-ion / IMR / LiFePO4: 10440, 14500, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
- Ni-MH / Ni-Cd: AA, AAA, AAAA, C, D
6. Awọn pato
| Iṣawọle | DC 5V/2A, 9V/2A (18W) |
| O wujade Voltage | 4.35V±1%, 4.2V±1%, 3.7V±1%, 1.48V±1% |
| QC Mode Output | 3000mA*1 (MAX), 2000mA*2 (MAX) |
| Standard Mode Output | 2000mA*1 (MAX), 1000mA*2 (MAX) |
| Awọn iwọn | 152mm × 73mm × 40mm (5.98" × 2.87" × 1.57") |
| Iwọn | 157.7g (5.56oz) (USB gbigba agbara ko si pẹlu) |
7. Itọju
- Jeki ṣaja di mimọ ati ofe kuro ninu eruku ati idoti.
- Store the charger in a dry environment away from direct sunlight and extreme temperatures.
- Yago fun sisọ tabi tẹriba ṣaja si awọn ipa to lagbara.
- Do not attempt to disassemble or modify the charger, as this will void the warranty and may cause damage or injury.
8. Laasigbotitusita
8.1. "EE EE" Error Message
If the LCD screen displays "EE EE", it indicates one of the following conditions:
- Over-discharged IMR Battery: The battery is severely discharged. The charger will attempt to activate it. If activation fails, the battery may be unrecoverable.
- Batiri ti o bajẹ: The battery is detected as damaged or faulty. Do not attempt to charge damaged batteries. Remove the battery immediately.

Image 8.1: The 'EE EE' error message indicates an over-discharged IMR battery.

Image 8.2: The 'EE EE' error message also indicates a damaged battery.
8.2. Charger Not Powering On
- Ensure the USB cable is securely connected to both the charger and the power source.
- Verify that the power source (USB adapter, power bank, etc.) is functioning correctly and providing sufficient power (DC 5V/2A or 9V/2A).
- Gbiyanju okun USB ti o yatọ tabi orisun agbara.
8.3. Batiri Ko Ngba agbara
- Check that the battery is inserted with correct polarity.
- Ensure the battery type is compatible with the UMS2 charger.
- Clean the battery contacts and charger contacts with a dry cloth to remove any dirt or corrosion.
- If the battery is severely over-discharged, it may take some time for the charger to activate it, or it may be unrecoverable.
9. Atilẹyin ọja ati Support
For warranty information and technical support, please refer to the official Nitecore website or contact your authorized Nitecore dealer. Keep your purchase receipt as proof of purchase for warranty claims.





