1. Introduction
This manual provides essential information for the safe and effective use of your Kircuit 35V AC/DC Adapter. This adapter is designed to convert AC power from a wall outlet into the DC power required by compatible Sancorp By Whall stick vacuum cleaners, specifically models EV-691R, EV-691H, and EV-691. Please read these instructions carefully before use.
Important Note: The 29.6V rating often associated with your vacuum cleaner refers to its battery voltage, NOT the charger's output voltage. This adapter provides 35V DC output.
2. Setup
- Unpacking: Carefully remove the AC/DC adapter from its packaging. Inspect the adapter and cable for any signs of damage. Do not use if damaged.
- Connect to Power Outlet: Plug the adapter's AC input prongs into a standard 100-240VAC, 50/60Hz electrical wall outlet. Ensure the outlet is easily accessible.
- Connect to Device: Insert the DC output barrel connector of the adapter firmly into the charging port of your compatible Sancorp By Whall EV-691R, EV-691H, or EV-691 stick vacuum cleaner.

Figure 2.1: Kircuit 35V AC/DC Adapter connected to a power strip.
The adapter is now ready to power your device or charge its battery.
3. Operating Instructions
Once properly connected, the adapter will begin to supply power to your vacuum cleaner. If the vacuum cleaner is off, it will typically begin charging its internal battery. Refer to your vacuum cleaner's manual for specific charging indicators (e.g., LED lights).
- Ensure the adapter is used in a well-ventilated area.
- Do not cover the adapter during operation.
- Disconnect the adapter from the power outlet when not in use for extended periods.

Figure 3.1: Kircuit 35V AC/DC Adapter showing its label with specifications.
4. Maintenance
- Cleaning: Disconnect the adapter from both the power outlet and the device before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and moisture when not in use. Avoid wrapping the cable too tightly around the adapter.
- Cable Care: Do not bend, twist, or pull the power cord excessively. Avoid placing heavy objects on the cord. Regularly check the cord for any cuts or damage.
5. Troubleshooting
Device Not Charging / Not Powering On
- Check Connections: Ensure the adapter is securely plugged into both the wall outlet and the vacuum cleaner.
- Verify Power Outlet: Test the wall outlet with another device to confirm it is supplying power.
- Inspect Adapter: Check the adapter and its cable for any visible damage. If damaged, discontinue use.
- Battery Condition: Rechargeable batteries have a limited lifespan, typically 1 to 3 years. If the vacuum cleaner's battery is old or depleted beyond its capacity to hold a charge, it may not accept a charge even with a functional adapter. This is a battery issue, not an adapter issue.
- Testing Adapter Functionality: If you suspect the adapter is faulty, a voltmeter can be used to check its output voltage. With the adapter plugged into a wall outlet and disconnected from the vacuum cleaner, carefully measure the voltage at the tip of the DC output connector. It should read approximately 35V DC. If no voltage or incorrect voltage is detected, the adapter may be faulty.
Protection Features
This adapter is equipped with safety protection features:
- 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.
If the adapter stops functioning, these protection mechanisms may have been triggered. Disconnect the adapter, wait a few minutes, and then reconnect. If the issue persists, consult customer support.
6. Specifications

Figure 6.1: Kircuit 35V AC/DC Adapter with specified cord length.
| Feature | Description |
|---|---|
| Brand | Kircuit |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 35V DC |
| Output Current | 0.5A (500mA) |
| Power Output | 17.5W |
| Connector Type | Barrel Connector |
| Compatible Devices | Sancorp By Whall Model EV-691R, EV-691H, EV-691 Stick Vacuum Cleaners |
| Protection Features | OVP, OCP, SCP |
| Cord Length | Approximately 6.5 ft |
| Color | Black |
7. Warranty Information
Specific warranty details for this Kircuit product are not provided in the product information. Please refer to the seller or manufacturer's official website for any applicable warranty terms and conditions.
8. Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or the manufacturer directly. Contact information can typically be found on the product packaging or the retailer's website where the product was purchased.





