Firstbeat Bodyguard 2 device has an in-built USB connector, so it doesn't need any charging cables. When the device's battery is running low during the measurement it signals this with a flashing orange LED light, see more info about the lights here.
- Gently remove the cable of the device by pulling on the cable to expose the USB connector.
- Plug the device into the USB port of your computer to charge.
- Wait for the device to charge. A flashing orange light indicates that device is charging. When the device is fully charged, the light stops blinking and remains on continuously. It may take 1-2 hours to fully charge the device.
- Reattach the cable. Make sure you attach the cable in the right way. The connector should fit securely with the device, and the stickers should be on the same side. See example picture from below.