1. Introduction
The TalentCell Mini UPS SL3400 is a high-capacity lithium-ion backup battery pack designed to provide uninterrupted power to various DC-powered electronic devices. With multiple output options, including DC 12V, DC 9V, USB-A, and USB-C PD, it ensures your essential devices remain operational during power outages or when off-grid.
2. Product Features
- High Capacity: 3.7V/27000mAh (11.1V/8800mAh) / 97.2Wh lithium-ion battery.
- Multiple DC Outputs: Four DC 12V ports (voltage range 9-12.6V, 4A Max total) and one DC 9V port (2A Max).
- USB Charging: One USB-A 18W Max output and one USB-C 18W Max output for charging smartphones and other USB-powered devices.
- Input: DC 12.6V/2A for recharging the UPS.
- Protection Features: Built-in short-circuit, over-current, and over-charging/discharging protection.
- Wide Compatibility: Suitable for wireless routers, modems, LED strips, CCTV cameras, LED panels, car DVRs, and other 5V/9V/12V DC electronic devices.
3. Package Contents
Verify that all items are present in your package:
- 1x TalentCell Mini UPS Lithium Battery (Model SL3400)
- 1x 12.6V/2A AC/DC Charger
- 2x DC 5.5x2.1mm Male to Male Power Cables
- 1x DC 5.5x2.1mm Male to DC 5.5x2.5mm Male Power Cable

Image: TalentCell Mini UPS SL3400 with its charger and various DC cables.
4. Specifications
| Parameter | Value |
|---|---|
| Model | SL3400 |
| Capacity | 3.7V 27000mAh (11.1V 8800mAh) / 97.2Wh |
| Input | 12.6V/2A |
| DC 12V Output | 4 ports, voltage range 9-12.6V, 4A Max total |
| DC 9V Output | 1 port, 2A Max |
| USB-A Output | 18W Max |
| USB-C Output | 18W Max |
| Dimensions | 6.3 x 5.51 x 1.3 inches (161 x 138 x 33 mm) |
| Weight | 1.54 pounds (approx. 700g) |

Image: Side view of the TalentCell Mini UPS SL3400 with its dimensions.
5. Product Overview (Ports and Indicators)
The TalentCell Mini UPS SL3400 features a range of ports and LED indicators for easy operation:
- USB-A Ports: Two USB-A ports for 5V/2A output.
- USB-C Port: One USB-C port for 18W Max output.
- DC 9V Output: One port for 9V/2A output.
- DC 12V Outputs: Four ports for 12V output (total 4A Max).
- Capacity LED Indicators: Four green LEDs indicate the remaining battery capacity (25%, 50%, 75%, 100%).
- Power LED Indicator: A green LED indicates the unit is powered on.
- Input DC 12.6V: Port for connecting the AC/DC charger.
- ON/OFF Switch: Main power switch for the unit.

Image: Front panel of the TalentCell Mini UPS SL3400 showing all output ports, input port, and LED indicators.
6. Setup and Operation
6.1. Charging the Mini UPS
- Connect the provided 12.6V/2A AC/DC charger to the 'IN/12.6V' port on the Mini UPS.
- Plug the charger into a standard wall outlet.
- The capacity LED indicators will light up sequentially to show the charging progress.
- When all four capacity LEDs are solid green, the Mini UPS is fully charged.

Image: Illustration of the charging status, showing LEDs indicating charging and full charge.
6.2. Connecting Devices
Before connecting any device, ensure its voltage and current requirements match the output specifications of the Mini UPS. Use the appropriate DC cable (5.5mm x 2.1mm) or USB cable for your device.
- Turn on the Mini UPS using the ON/OFF switch. The power LED indicator will light up.
- For DC-powered devices (e.g., routers, modems, CCTV cameras): Connect one end of the appropriate DC cable to the corresponding DC output port (9V or 12V) on the Mini UPS and the other end to your device's input port.
- For USB-powered devices (e.g., smartphones, tablets): Connect a USB cable to either the USB-A or USB-C port on the Mini UPS and the other end to your device.
- The Mini UPS will automatically provide power to the connected devices.

Image: The TalentCell Mini UPS SL3400 simultaneously powering a router, headphones, smartphone, smart speaker, and CCTV camera.
Video: A brief demonstration of the 12V Mini UPS battery pack in use, highlighting its compact size and multiple output options.
7. Safety Instructions
Read and understand all safety instructions before using this product.
- Do not use the 12V lithium backup battery pack in places with high humidity or where it may be exposed to wet conditions.
- Do not modify or disassemble the Mini UPS power bank.
- Do not throw the 12V power bank into fire or water.
- Do not place the power bank during charging on flammable materials such as in a bed or on carpets.
- Ensure the size of your device's input port is DC 5.5x2.1mm. If not, you will need to purchase the proper cable or adapter separately.
8. Maintenance
- Avoid long-term storage in a low voltage state.
- To extend the service life of the battery, it is suggested to charge it every three months if stored for a long period.
- Keep the unit clean and free from dust. Use a dry, soft cloth for cleaning.
9. Support
For technical support or inquiries regarding your TalentCell Mini UPS SL3400, please contact Talentcell Technology directly through their official channels or the retailer where the product was purchased.





