Here’s everything you need to know to ensure your Circular Ring 2 charges correctly and efficiently.
1️⃣ Plug in Your Charger
- Use the USB-C cable provided with your charger.
- Plug it into a USB-C port from a reliable power source (laptop, power bank, wall adapter, etc.) — we recommend a quality-brand adapter.
2️⃣ Place the Ring Correctly
- Place your ring on the charging dock in the charging case with the sensor of the ring facing north as shown in the illustration. The ECG electrodes of the ring must be plugged into the notches of the charger guide.
- Once placed, press the button for 1 second on the back of the charger to begin charging.
3️⃣ Check the LED Indicator
By default, when the charger is plugged into a power source with no ring in it, it will charge its internal battery automatically.
The LED of the charger will be:
🟠 Pulsing Orange when the charger is actively charging.
Or
🟠 Solid Orange when the battery of the charger has reached 100% capacity and is fully charged.
💡 When the ring is placed into the charger; the charger’s LED light gives you clear feedback:
- 🟢 Pulsing green = Ring is charging
- 🟢 Solid green = Ring is fully charged
- 🔴 Pulsing red = Ring is charging, but the charger’s battery is low
To check the **battery level of the charging case **(even with the ring on it), hold the button for 2 seconds:
- 🔴 Red = Less than 30% battery
- 🟠 Orange = 30–70% battery
- 🟢 Green = 70–100% battery
❗ Troubleshooting Charging Issues
If your ring doesn’t seem to charge or the LED doesn’t light up:
- Rotate the Ring 180° (like a wheel) to ensure contact alignment with the charger as shown in the illustration.
- Watch the LED for at least 10 seconds to confirm activity.
- Try another power source or adapter. it is recommended that a premium brand AC adapter should be used. Some off-market adapters will prevent the ring from reaching a fully charged state. Charge your ring at room temperature. Avoid charging in your cold car, garage, or a room that is too hot.
- Keep it at room temperature. Charging in environments that are too cold or hot may disrupt performance. Always charge at room temperature (0°C–45°C) for safety and performance.
⚠️ Important tips
- The ring is not charging automatically, make sure to press the button after placing the ring, as it does not auto-start.
- Avoid using off-brand power adapters, which may cause slow or incomplete charging.
- After a firmware update, battery readings in the app may be off—fully charge your ring once again to recalibrate.
🚨 Still Not Working?
If you’ve tried the steps above and the ring still isn’t charging, your charger may need to be replaced.
📩 Contact our support team at https://www.circular.xyz/contact-us. We’re here to help!
Updated on: 09/05/2026