03-31-2019 10:29 AM - edited 03-31-2019 10:31 AM
Sorry to hear about the trouble, @luizauréli75100. The charging issue is the first one to check. Make sure that your connections are in properly. If you have another way to charge the Grip, please do. For example, try using a different cable and/or a different power plug.
If the issue persists, please contact our Support team here https://gopro.com/help/ContactUs , they will be able to walk you through the next steps. You may reach them by phone or chat. Thanks!