How to Charge REJO Heat-Not-Burn Devices (HS40 Guide)

2025/07/14

How to Charge REJO Heat-not-burn Tobacco Effectively

Charging your REJO heat-not-burn device correctly is essential to keeping your sessions smooth and hassle-free. But if you've ever noticed your device not responding when plugged in, the LED not lighting up, or the battery draining quicker than expected, you're not alone. These issues are more common than you think—and they often come down to simple charging mistakes, like using the wrong cable, poor-quality adapters, or overcharging without realizing it.

 

In this guide, we’ll use the REJO HS40—one of REJO’s flagship heat-not-burn models—as a practical example to show you how to charge your device the right way. Whether you’re new to heat-not-burn tobacco or looking to improve battery life and performance, we’ll walk you through step-by-step instructions, key charging tips, and troubleshooting advice to keep your REJO device running at its best.

 

Let’s get started and make sure your next tobacco session is powered up and worry-free.

 

 

What You’ll Need Before Charging

 

Before charging your REJO heat-not-burn tobacco device—such as the REJO HS40—it’s important to gather the right accessories to ensure safe and efficient charging. Using the wrong cable or adapter can lead to slow charging, battery damage, or even device malfunction. Here’s what you’ll need:

 

Your REJO HS40 Device

Make sure the device is clean and dry, with no residue near the charging port.

 

 

A Type-C Charging Cable

The REJO HS40 comes with a USB Type‑C cable in the box. Be sure to use this cable or a high-quality replacement to ensure stable current flow and a secure connection.

 

A 5V/1–2A USB Power Adapter or a Laptop USB Port

Use a standard adapter that provides 5 volts and between 1 to 2 amps of current. Avoid using fast chargers or high-wattage adapters that are designed for smartphones, as they may not be suitable for the HS40's battery system.

 

 

Important Note:

Never use the REJO HS40 while it’s charging. Doing so may not only interrupt the charging process but could also affect device performance or pose a safety risk. Always wait until the battery is fully charged before using the device again.

 

Step‑by‑Step Charging Instructions

Now that you’ve prepared everything you need, let’s go through the process of charging your REJO HS40 heat-not-burn device properly. Following these steps will ensure safe and efficient charging without damaging the battery or internal components.

 

Connect the Type‑C Cable

Locate the USB Type‑C charging port, which is usually found at the bottom of the HS40 device. Gently insert the Type‑C connector into the port until it fits snugly—don’t force it in. Then, plug the other end of the cable into a USB power adapter or a computer USB port.

Using the original REJO charging cable is highly recommended to ensure compatibility and avoid loose connections.

 

Check the LED Indicator

Once the device is connected, look for a small LED light near the power or activation button. This indicator should turn red or orange, showing that the device has started charging.

 

If the light doesn’t turn on, try the following:

Double-check both ends of the charging cable to ensure they’re securely connected.

Test the cable and adapter with another device, or try a different port.

Inspect the charging port for dust, debris, or physical damage.

A properly functioning LED is your best sign that the charging process is working as expected.

 

 

Wait for a Full Charge

Allow the HS40 to charge uninterrupted. A full charge typically takes 1.5 to 2 hours, depending on the power source. During this time, avoid turning the device on or removing the cable unnecessarily.

 

Once the battery is fully charged, the LED will either:

Turn green, indicating a full charge, or

Turn off completely, depending on the firmware version of your device.

At this point, you can safely unplug the device and get ready for your next tobacco heating session.

By following these simple steps, you’ll help preserve the battery health of your REJO HS40 and ensure a smooth, reliable vaping experience every time.

 

Troubleshooting Common Charging Issues

Device Not Charging

Check if the cable is fully inserted.

Try another USB-C cable or adapter.

Clean the charging port gently if there’s dust.

Still not working? Contact REJO support.

 

Charging Stops Suddenly

Let the device rest for a few minutes, then reconnect.

Use a different power source or cable.

Device Overheating

A little warmth is normal—hot to the touch is not.

Unplug immediately and allow it to cool.

Avoid charging in hot environments.

If problems continue, stop using the device and reach out to REJO for help.

 

Final Thoughts

Charging your REJO heat-not-burn device—especially models like the REJO HS40—is quick and easy when you follow the right steps. Using the correct cable, monitoring the LED indicators, and avoiding overcharging can go a long way in keeping your device running smoothly.

 

REJO’s devices are designed with user convenience and long battery life in mind. With features like Type-C fast charging and large battery capacity (up to 40 uses per full charge), the HS40 offers a reliable and satisfying heat-not-burn experience. Whether you're new to REJO or already enjoying their advanced heating technology, proper charging ensures you get the most out of every session.