Nitecore UMS4 Manual

Features

• Intelligent USB Four-Slot Superb Charger
• QC 2.0 input available
• Capable of charging 4 batteries simultaneously and controlling each slot independently
• Up to 3,000mA charging speed in a single slot
• Compatible with Li-ion and Ni-MH/Ni-Cd batteries with automatic detection
• Automatic detection of battery power level and automatic selection of the appropriate voltage and charging mode (LiFePO4 and 3.8V Li-ion batteries excluded)
• Automatic selection between 3 charging modes (CC, CV and -dV/dt)
• Energy-efficient LCD display for real-time charging information
• Capable of manually selecting the charging cut-off voltage and the charging current
• 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
• Li-ion battery restoration
• Overtime charging protection
• Automatic detection of battery internal resistance and display of battery health
• Made from durable and fire-retardant PC materials
• Optimal heat dissipation design
• Certified by RoHS, CE, FCC and CEC
• Insured worldwide by Ping An Insurance (Group) Company of China, Ltd.

Accessories

USB Charging Cable

Specifications

Operating Instructions

Connect to power source: connect the UMS4 to an external power source (a USB adapter, a computer or other USB charging devices) via the USB charging cable.

Insert batteries: The UMS4 features 4 independently controlled charging slots. Insert batteries of supported types into each slot according to the polarity marks on the slot. After battery installation, the UMS4 begins charging and presents Battery Health by "Good" or "Poor", Internal Resistance, Charging Current, Battery Voltage, Charged Volume and Charging Time on the LCD screen.

Battery Inspection and Error Report: The UMS4 has reverse polarity protection and anti-short circuit function. If there are batteries inserted with polar reversed or shortcircuited, the LCD screen of relevant slot will indicate "EE EE" and the power level display will flash to notify the user of an error.

Smart charging: The UMS4 can choose appropriate charging currents based on intelligent detection about battery types and capacities. Manual charging current selection is also available. The UMS4 is compatible with:

1. 3.6V/3.7V Li-ion rechargeable batteries
2. 3.8V Li-ion rechargeable batteries (4.35V±1% when fully charged)
3. 1.2V Ni-MH/Ni-Cd rechargeable batteries
4. 3.2V LiFePO4 batteries

Default Settings

The default settings (not manually configured) for the UMS4 are:

* When charging 1 or 2 batteries, it is recommended to put them into Slot 1 and Slot 3, or into Slot 2 and Slot 4, to achieve a higher default charging current of 2,000mA. Otherwise the default charging current is 1,000mA.
** When charging 1 or 2 batteries, it is recommended to put them into Slot 1 and Slot 3, or into Slot 2 and Slot 4, to achieve a wider selectable range of charging current of 300mA-3,000mA. Otherwise the selectable range of charging current is 300mA2,000mA.
Note: The UMS4 can automatically select charging modes for Ni-MH/Ni-Cd batteries and 3.7V Li-ion batteries. LiFePO4 batteries and 3.8V Li-ion batteries require manual settings on charging cut-off voltages. For the battery whose length is >60mm (2.4"), the UMS4 automatically identifies its capacity as >1,200mAh.

Button Operations

During the charging process:
Short press the C button to cycle through the charging status of the 4 slots.
Short press the V button to cycle through Battery Health, Internal Resistance, Charging Current, Battery Voltage, Charged Volume and Charging time on the LCD screen.
Long press the C button to enter the Charging Setting Mode.
Long press the V button to enter Restoration Mode. (Only effective to over-discharged IMR batteries)

After entering the Charging Setting Mode:
Short press the C button to switch to different setting parameters (Charging Current and Cut-Off Voltage).
Short press the V button to increase with a 100mA increment each time when setting the Charging Current; or to switch to different battery types and voltage readings when setting the Cut-Off Voltage.
Long press the V button to directly access the maximum setting when setting the Charging Current.
Long press the C button to save and exit the Charging Setting Mode.
Note: Perform no action in 10 seconds to exit the Charging Setting Mode without saving and return to the previous settings.

Charging Voltage Settings

The UMS4 is compatible with 3.6V/3.7V Li-ion and Ni-MH/Ni-Cd batteries with automatic detection and adoption of the suitable charging voltage. For LiFePO4 batteries and 3.8V Li-ion batteries, please follow the steps below for charging voltage settings:

1. After the battery is inserted and the charging process begins, short press the C button to select the correct slot and long press the C button to enter Charging Setting Mode.
2. After entering Charging Setting Mode, short press the C button. When the screen shows the flashing text "CHG. MODE", short press the V button to select the correct charging voltage (3.7V/4.2V/4.3V).
3. For LiFePO4 batteries, the voltage needs to be set to 3.7V. For 3.8V Li-ion batteries, the voltage needs to be set to 4.3V.
4. When the setting is finalized, long press the C button to save and exit the Charging Setting Mode.

Charging Current Settings

Please follow the steps below for charging current settings:

1. After the battery is inserted and the charging process begins, short press the C button to select the correct slot and long press the C button to enter Charging Setting Mode.
2. After entering Charging Setting Mode, the screen will show the flashing text "CHG. STATUS". Short press the V button to increase the charging current with a 100mA increment each time. Long press the V button to directly access the maximum setting.
3. When the setting is finalized, long press the C button to save and exit the Charging Setting Mode.
   Note: When the input power is insufficient and a large charging current is set, the charger will automatically adopt the intelligent current distribution according to the input power.

QC Charging Mode

The UMS4 is QC 2.0 input available. When the charger is powered by a QC supportive device or connected to a QC adapter, the screen will show "Quick Charge" and the single slot max output will achieve 3,000mA.

Automatic Battery Internal Resistance Detection

When the UMS4 is on and the battery is installed, it will automatically detect and display the Internal Resistance below the "CHG. STATUS". When the Internal Resistance is below 250mΩ, it will show "Good" on the screen. When it is above 250mΩ, it will show "Poor" on the screen to indicate that the battery should be replaced.

Charged Volume Calculation

During the charging process, the system will automatically calculate and display the Charged Volume below the "CHG. STATUS".

Anti-short Circuiting and Reverse Polarity Protection

If there are batteries inserted with polar reversed or short-circuited, the screen will flash to show "EE EE".

Energy Saving Function

If there is no action to the buttons or batteries in 3 minutes, the screen will automatically go dim to save energy. Perform any action to light up the screen.

Over-Discharged Li-ion Battery Activation

The UMS4 is capable of activating over-discharged Li-ion batteries with a protective circuit. After battery installation, UMS4 will test and activate the battery before charging. When a battery is detected as damaged, the screen will show "EE EE".

Over-Discharged IMR Battery Restoration

When an over-discharged IMR battery is inserted, the screen will show "EE EE". In this case, long press the V button to enter Restoration Mode. After that, the charging process will continue. The battery should be replaced if it fails to be restored after several attempts.
NOTE: When attempting to restore an IMR battery, reverse polarity protection is temporarily disabled. Please ensure batteries are correctly inserted. Failing to do so may result in fire or explosion.

Overtime Charging Protection

The UMS4 will separately calculate the charging time of each battery. When the charging time exceeds 20 hours in one slot, it will automatically cease the charging process of this slot and display "END" below the "CHG. STATUS". This is to prevent possible overheat or even explosion due to battery quality issue.

Precautions

1. The charger is restricted to charging Li-ion, IMR, LiFePO4, Ni-MH/Ni-Cd rechargeable batteries only. DO NOT use the charger with other types of batteries as this could result in battery explosion, cracking or leaking, causing property damage and/or personal injury.
2. Moderate heat from this product is to be expected during the charging process, which is normal.
3. Ambient Temperature of Usage: -10~40℃ (14~104℉); Temperature of Storage: -20~60℃ (-4~140℉)
4. Carefully read all labels on the device to ensure batteries are installed correctly.
5. Please connect this charger to power supplies with the input voltage stated in the specifications of the user manual. If the input voltage is too low or too high, it may lead to malfunctions, or even a fire.
6. DO NOT charge batteries if there is any sign of faulty or short circuit.
7. The charger is designed for adults. Use of the charger by kids under age must be under supervision. Operation, using or cleaning of the charger may NOT be done by kids aged 8 years or younger.
8. DO NOT leave the product unattended while it is connected to a power supply. Unplug the product at any sign of malfunction.
9. Please make sure the correct program and settings are chosen and set. Incorrect program or setting may damage the charger, or cause fire and explosion.
10. DO NOT attempt to charge primary cells such as Zinc-Carbon, Lithium, CR123A, CR2, or any other unsupported chemistry due to risk of explosion and fire.
11. DO NOT charge a damaged IMR battery as doing so may lead to charger short-circuit or even explosion.
12. DO NOT charge or discharge any battery having evidence of leakage, expansion/swelling, damaged outer wrapper or case, color-change or distortion.
13. Use the original adapter and cord for power supply. To reduce the risk of damage to the power cord, ALWAYS pull by the connector rather than the cord. DO NOT operate the charger if it appears damaged in any way.
14. DO NOT store or use the product in an environment where the temperature is extremely high / low or changes rapidly, or in a confined area with a high temperature.
15. Store the device in ventilated areas. DO NOT use the device in moist environment and keep away from any combustible materials.
16. Avoid any shock or impact to the device.
17. DO NOT place any conductive or metal object in the device to avoid short circuiting and explosions.
18. DO NOT overcharge or over-discharge the batteries. Please recharge the battery as soon as the power runs out.
19. Unplug the device and remove all batteries when it is not in use.
20. DO NOT disassemble or modify the device as doing so will render the product warranty invalid. Please refer to the warranty section in the manual for complete warranty information.
21. DO NOT misuse in any way! Use for intended purpose and function only.