Visible Band 2.0 charges using a magnetic charging cable. A full charge takes about one hour.

Attach the magnetic end of the charging cable to your band. Plug the other end into a USB charger (ideally a wall plug).

Four rotating red lights show that charging is in progress. A full charge takes around one hour.

Always charge your band for at least 1 hour and wait for the red indicator lights to show it is fully charged.

When charging for the first time, the four red indicator lights may rotate faster than usual when charging is complete. This means that the band is fully charged and ready to pair with the Visible app.

All four small red indicator lights will stop rotating and become solid red when the band is fully charged.

We recommend recharging your band when the battery level is around 10%. The band works best when it has more than 10% charge.

You can find your band’s battery level in the app. Look for the percentage next to the band icon in the top right corner of the Today page. You’ll also get a notification when your battery drops to 20% or below.

Here are some simple everyday charging tips to help keep charging easy and reliable:

1. Keep the charging contacts clean and dry. Before charging, make sure there is no moisture, dust, or dirt on the charging contacts of your sensor or USB cable. The sensor must be dry before charging.

2. Check the connection. Make sure the magnetic charging pins are correctly lined up and snapped into place against the sensor.

3. Use a wall plug. A wall outlet gives a stronger, more reliable power supply than a computer or laptop USB port.

4. Recharge at 10%. Don't wait until the battery is empty to recharge. Recharging at around 10% helps prevent the band from turning off when you need it most and supports long-term battery health.

5. Always charge for at least one hour. The four red indicator lights will rotate when charging is in progress. Once fully charged, after around an hour, the lights will go solid red. If the battery is completely empty, it may take a few minutes for charging to start.

6. Close the Visible app while charging. Fully close the Visible app while charging. This stops the band from trying to connect, which can interfere with the charging process.

You can buy replacement Polar Charge 2.0 USB-A chargers from the Visible Shop. Go to Profile > Visible Shop in the Visible app for more information.

The band uses a rechargeable battery that, when properly cared for, has an average lifespan of 2-3 years, retaining around 80% of its original capacity after this time. The actual lifespan of the battery, however, will depend on how the band is charged and cared for.

Here are some simple tips to help keep your battery healthy and last longer:

1. Keep the sensor clean and dry
Clean the sensor with lukewarm water and mild soap only, and make sure it is thoroughly dry before wearing or charging. This prevents the buildup of dirt or debris that could affect charging over time.

2. Don't leave the battery fully charged or discharged for too long

Keeping the battery charge between around 10% and 90% puts less strain on the battery. We recommend recharging at around 10% and unplugging soon after it reaches full charge to help maintain battery health.

3. Charge your band safely

Do not charge the band if the sensor is wet or near flammable materials or surfaces. The band should also not be charged or worn in extreme temperatures, below +14 °F/ -10 °C or above +120 °F/ +50 °C. Exposure to extreme heat, cold, or direct sunlight can damage the battery and reduce overall function.

4. Store your band with at least 50% charge
Even when your band isn’t in use, the battery still slowly loses charge over time. To help keep your band's battery healthy and ready for use, charge the band to around 50% before storing. If you won't use it for a while, recharge it about once a month. This helps prevent it from draining completely.

If your band isn't charging as expected, for example, you place it on the charger and it's unresponsive, or you don’t see the red rotating lights that indicate charging status, we recommend the following troubleshooting:

If your band still won't charge, try a quick restart. Don't worry, restarting your band won't erase any heart rate data.

To restart your band:

After restarting your band, reconnect the charger and put the band back on charge for an hour. If the battery is completely empty, it may take several minutes for charging to start.

If you have restarted your band and it still isn't charging, please contact our Member Support team for help.

If your band battery is depleting much faster than expected, there are steps you can take to improve battery performance.

In the Visible app, go to Profile > About > Troubleshooting > Band firmware update and, if available, follow the prompts to update. Keeping your firmware up to date is key to ensuring optimal battery performance.

Once your firmware is up-to-date, in the Visible app, go to Profile > About > Troubleshooting > Band factory reset and follow the instructions to reset your band.

After the reset, charge your band for at least one hour. Make sure the red LED lights turn solid red to indicate a full charge, and always close the Visible app while charging.

Keep an eye on your battery over the next few days. If you're still having problems with battery drainage after trying the steps above, our Member Support team can help.

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