My FW13 AMD laptop (61Wh battery) can last 11hr+, technically. If I'm doing anything other than light web browsing, that quickly drops to 8hr. If I'm watching videos, it's more like 5hr.

Unfortunately, at least on Linux, it requires quite a bit of tuning for the moment. But there are some pretty good guides.

Suspend battery life still isn't great, but it's _much_ better (with s2idle supported) on the latest-gen AMD platform.

I previously had the 11th gen Intel and... I got much better battery life than you, but it was still pretty bad.