Best answer by JackJ
I can verify that the Honor Band 4 is supposed to charge until 100%. The battery might be miscalibrated.
Please try resetting the band! There are two ways to restore factory settings:
1.l Restore using the Band. (1). Swipe the screen until you see the menu icon and select it. (2). Swipe the screen until you find the restore icon and select it. 3. Select the v icon to complete the factory restore.
1.l Restore using the Huawei Wear app. First, ensure you have a working Bluetooth connection between your Band and phone. Open the Huawei Wear app and touch to enter the Band settings menu. Touch Restore factory settings to restore your Band to factory settings.
If you restore your Band to factory settings, all activity, sleep and time data will be deleted. You will also need to re-pair the Band with your phone.
Please let me know if this helped!