1. Introduction and Overview
The Thermacell E-Series Rechargeable Mosquito Repeller provides an effective, scent-free, and spray-free solution to keep mosquitoes away. It creates a 20-foot protection zone, allowing you to enjoy outdoor activities without the nuisance of mosquito bites. This device utilizes a proprietary formula that targets mosquito sensors, driving them away without direct application to your skin.
Key features include:
- Effective 20FT Zone Technology: Engineered to precisely diffuse repellent, creating a 20-foot zone of mosquito protection.
- Rechargeable Battery: Equipped with a 5.5-hour rechargeable lithium-ion battery.
- Scent-Free & Spray-Free: Repels mosquitoes without DEET sprays or lotions on your skin, and is scent-free with no smoke or flames.
- Proprietary Formula: Independently tested and EPA reviewed for safety and effectiveness. Repels tough mosquitoes, including those that may transmit Encephalitis, West Nile Virus, and Zika Virus. People and pet friendly. For outdoor use only.
- Portable: Compact and lightweight design makes it ideal for various outdoor settings and is allowed on airplanes.


2. Setup and Getting Started
Follow these simple steps to set up your Thermacell E-Series Repeller:
- Charge the Device: Before first use, fully charge the device using the included USB charging cable. The device features LED lights to indicate charging status and battery level. A full charge typically takes about 5 hours.
- Remove Repellent Refill Cap: Gently remove the cap from the repellent refill cartridge.
- Insert Repellent Refill: Open the top of the repeller by gently pulling it off (it's magnetic). Insert the repellent refill into the designated slot inside the device. Ensure it is seated properly.
- Close the Device: Replace the top cover of the repeller, ensuring it clicks securely into place.
- Power On: Press the power button on the front of the device to turn it on. The device will begin to warm up.

For optimal performance, allow the device approximately 15 minutes to reach maximum protection effectiveness after turning it on. The repellent diffuses into the air to form the protection zone.
3. Operating Instructions
The Thermacell E-Series Repeller is designed for simple operation:
- Turning On: Press the power button once. The indicator lights will illuminate, and the device will begin heating the repellent.
- Turning Off: Press and hold the power button for approximately 2 seconds until the indicator lights turn off.
- Placement: Place the repeller in the center of the area you wish to protect. For best results, avoid placing it in windy conditions, as strong winds can dissipate the repellent.
- Battery Life: The rechargeable lithium-ion battery provides up to 5.5 hours of continuous mosquito protection. Monitor the indicator lights for battery status.

4. Maintenance
To ensure the longevity and effectiveness of your Thermacell E-Series Repeller, regular maintenance is recommended:
- Refill Replacement: Each repellent cartridge provides up to 12 hours of mosquito protection. Replace the cartridge when the liquid level is low or depleted. Simply open the top, remove the old cartridge, and insert a new one.
- Cleaning: Wipe the exterior of the device with a damp cloth as needed. Do not submerge the device in water or use harsh chemicals.
- Storage: When not in use for extended periods, store the device in a cool, dry place. Ensure the repellent cartridge is removed and its cap is replaced for proper storage.

5. Troubleshooting
If you encounter issues with your Thermacell E-Series Repeller, consider the following:
- Device Not Turning On: Ensure the device is fully charged. Connect it to the USB charging cable and allow sufficient time for charging.
- No Repellent Mist/Vapor: Verify that a repellent cartridge is properly inserted and that it contains liquid. Allow up to 15 minutes for the device to heat up and begin diffusing.
- Mosquitoes Still Present: Check if the device is placed in an area with strong wind, which can reduce effectiveness. Relocate the device to a more sheltered spot. Ensure the repellent cartridge is not empty.
- Short Battery Life: Ensure the device is fully charged before each use. Battery performance may vary with extreme temperatures.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Thermacell |
| Model Name | Rechargeable Mosquito Repeller |
| Model Number | E55S |
| Color | Beige |
| Style | 5.5HR – Beige |
| Material | Plastic |
| Product Dimensions | 4.5"L x 7.75"W x 4.5"H |
| Item Weight | 12.8 ounces |
| Battery Life | 5.5 hours (rechargeable) |
| Protection Zone | 20 feet |
| Repellent Refill Duration | 12 hours per cartridge |
| UPC | 843654005119 |
7. Warranty and Support
Thermacell stands behind its products with a comprehensive warranty:
- Standard Warranty: The Thermacell E-Series Rechargeable Mosquito Repeller includes an automatic 2-year warranty.
- Extended Warranty: You can extend your warranty to 3 years with product registration. Please refer to the packaging for details on how to register.
- Satisfaction Guaranteed: Backed by the Thermacell Guarantee (see packaging for details).
For further assistance, technical support, or warranty claims, please visit the official Thermacell website or contact their customer service directly. Contact information can typically be found on the product packaging or their website.




