using GTR 4 - fantastic battery life. If you're not hung up on wear OS - amazfit's zepp OS is pretty decent - very very smooth - zero lag, been using it for 2-3 weeks now - battery life can tahan 4-5 days easily with always on, heavy use on heart rate monitoring every minute...if non-heavy use i think 2 weeks can tahan without AOD.

Or buy GTR 3 pro - not much difference between the two except GTR 4 GPS is better and latest ZEPP OS 2. Price diff about RM 100.

GTR 4:
https://www.lazada.com.my/products/malaysia...1VXq2hM&stock=1

GTR 3 Pro:
https://www.lazada.com.my/products/ori-my-s...1654744455.html?