UPBRIGHT VMAI Model T690 Power Supply
User Manual: UpBright 16.8V AC/DC Adapter
For VMAI T690 Multi-Function Cordless Electric Spin Mop
1. Introduction
This manual provides essential information for the safe and effective use of your UpBright 16.8V AC/DC Adapter. This adapter is designed to be compatible with the VMAI Model T690 14.4V 2550mAh Lithium Li-ion Battery Pack used in Multi-Function Cordless Electric Spin Mops for floor cleaning. Please read this manual thoroughly before use and retain it for future reference.
2. Safety Information
Important Safety Notes:
- The 14.4V rating refers to the vacuum's battery voltage, NOT the charger's output voltage. This adapter provides 16.8V output. Always verify compatibility with your unit before connecting.
- This adapter features multiple safety protections:
- OVP (Over Voltage Output Protection): Protects against excessive output voltage.
- OCP (Over Current Output Protection): Protects against excessive output current.
- SCP (Short Circuit Output Protection): Protects against short circuits.
- Ensure the adapter is used in a well-ventilated area.
- Do not expose the adapter to water or excessive moisture.
- Do not disassemble or modify the adapter.

Figure 2.1: Built-in multiple safety circuits for reliable operation.
This image displays the UpBright AC/DC adapter with an umbrella graphic symbolizing protection, surrounded by icons representing various safety features: overcharge protection, overcurrent protection, shortage protection, lightning protection, overvoltage protection, and temperature protection. A small chip icon labeled "High quality chip" is also shown.
3. Product Overview
The UpBright 16.8V AC/DC Adapter is a Class 2 switching power supply designed for efficient and safe charging. It features a standard US plug and a barrel connector for compatibility with the VMAI T690 Cordless Electric Spin Mop.

Figure 3.1: UpBright 16.8V AC/DC Adapter.
This image shows the UpBright 16.8V AC/DC adapter. It is a black power brick with a two-prong US plug on one end and an attached black cord terminating in a barrel connector on the other end. The adapter body has product information and safety certifications printed on it.

Figure 3.2: Compatibility with VMAI T690 Mop.
This image features the UpBright AC Adapter positioned above a VMAI T690 Cordless Electric Spin Mop. The text "UpBright AC Adapter Power Supply Compatible with:" is displayed prominently, with "(Machine not Included)" below it, clarifying that the mop is for illustrative purposes of compatibility.
4. Setup
- Unpack: Carefully remove the AC/DC adapter from its packaging.
- Inspect: Check the adapter and its cable for any visible damage. Do not use if damaged.
- Connect to Device: Insert the barrel connector of the adapter firmly into the charging port of your VMAI T690 Cordless Electric Spin Mop.
- Connect to Power Outlet: Plug the adapter's two-prong plug into a standard 100-240VAC 50/60Hz wall outlet.
5. Operating Instructions
Once connected, the adapter will begin charging the battery pack of your VMAI T690 mop. Refer to your mop's user manual for specific charging indicators (e.g., LED lights) and recommended charging times.
- Ensure the mop is turned off during charging for optimal battery life.
- Do not leave the adapter plugged in indefinitely after the battery is fully charged, although the adapter has overcharge protection.
- Always disconnect the adapter from the wall outlet when not in use.
6. Maintenance
- Keep the adapter clean and free from dust. Use a dry, soft cloth for cleaning.
- Store the adapter in a cool, dry place when not in use.
- Avoid bending or crimping the power cord excessively, as this can damage the internal wires.
7. Troubleshooting
If you encounter issues with charging, consider the following:
- No Charge Indication:
- Verify the adapter is securely plugged into both the mop and the wall outlet.
- Test the wall outlet with another device to ensure it is functional.
- Check the adapter's cable for any visible damage or breaks.
- Battery Not Accepting Charge:
Rechargeable batteries have a finite lifespan, typically 1 to 3 years. If the battery in your VMAI T690 mop is old or dead, it may no longer accept a charge, even if the charger is functioning correctly. This is a common issue with batteries, not necessarily an adapter malfunction.
To determine if the issue lies with the battery or the charger, a voltmeter is required to test the charger's output voltage. If the charger outputs the correct voltage (16.8V), the battery is likely the issue.
8. Specifications
| Attribute | Detail |
|---|---|
| Product Model Number | VMAI Model T690 Power Supply (Compatible) |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 16.8VDC |
| Output Current | 1A (1000mA) |
| Power Output | 16.8W |
| Connector Type | Barrel Connector |
| Product Dimensions | 4 x 3 x 2 inches |
| Item Weight | 4 ounces |
| Included Components | 1 adapter |
| Manufacturer | UpBright |
9. Warranty and Support
Your UpBright 16.8V AC/DC Adapter comes with the following warranty:
- 30 Days Refund: If you are not satisfied with the product, you may be eligible for a refund within 30 days of purchase.
- 24 Months Exchange: The product is covered by a 24-month exchange warranty for manufacturing defects.
For support or warranty claims, please refer to the contact information provided with your purchase or visit the official UpBright store on Amazon:
Visit the UPBRIGHT Store on Amazon

Figure 9.1: International Outlet Adapters and Warranty Certificate.
This image is divided into two parts. The left side shows three different international outlet adapters (AU, EU, UK) with the text "Come With A Suitable Outlet Adapter (Only One) to Fit Your Country/Area For International Order". The right side displays a "THIS PRODUCT Comes With A UpBright® LIMITED WARRANTY CERTIFICATE + UpBright® Limited Warranty" with a gold product warranty seal.
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