Huawei WATCH 2 Faq page 3

What can I do if my watch's battery drains
quickly and has a short standby time?
1. Check whether you are using the Bluetooth version or the 4G version.
You can generally expect to get around 1.5 days of full usage (including in
Watch mode) from the 4G version, and approx 2 days of usage from the
Bluetooth version. In addition to battery capacity, the usage time of your
watch depends on your usage scenario, frequency, and the network
conditions. Using the watch to workout (GPS), listen to music, or make calls
will have a significant impact on battery life.
2. For the Bluetooth version (or 4G version without a SIM card inserted): If
the standby time is less than one and a half days, perform the following
steps to check for the cause.
(1) Check whether the rapid power consumption is caused by a third-party
app.
In the Wear OS by Google app, enter the Advanced Settings menu and
then touch Watch battery to check detailed battery statistics.
If there are other third-party apps consuming a lot of power in the

background, but you never or rarely use them, it is recommended that you
uninstall these apps.