Use APKPure App
Get Battery Gear for Galaxy Watch old version APK for Android
Companion app for Battery Gear Widget
This Application is a battery data provider for tizen watch app "Battery Gear Widget", it need to be installed for proper work of widget.
App supports only Tizen OS watches: Samsung Galaxy Watch, Samsung Gear Sport, Samsung Gear S3 and Samsung Gear S2.
You can install watch app part from here: https://galaxy.store/wgt
If short link not works for you, please search by tag "zhsapps" on Galaxy Apps