Recent EMUI 10 and EMUI 10.1 updates have been causing battery problems on some devices. According to several reports, devices have been unable to charge beyond 60% and have suffered from excessive battery drain.
https://www.notebookcheck.net/Recent-EMUI-10-and-EMUI-10-1-updates-may-be-causing-battery-problems-for-some-Huawei-devices.481488.0.html