a) Keep the earbuds into the charging case (for TWS) and put the charging case on charging

b) Put the device on charge (for rest of the devices- Neckband/Speaker/Headphones)"

Using the C-Type usb cable received with the product, connect the device with the charging cable to the USB port on the laptop/computer

Make sure that your PC/laptop is turned ON and not in sleep / hibernate mode

If it still doesn't work try to charge from a different wall socket or adapter