I wrote a blog post about my experience with the Minisforum V3 AMD Tablet, focusing on how Linux/Fedora/KDE works on this device and how Linux performs on the tablet devices.
During my normal usage in Linux, which includes web browsing with Firefox, video playback with Haruna Media Player (with hwdec set to auto), writing in Obsidian, and lightweight coding in Visual Studio Code and Android Studio, the tablet lasts for 6 hours.
There’s no such thing as lightweight android studio lol. The battery would likely last much longer just playing a movie at low brightness, which is usually what hardware companies do to measure and advertise battery life.
TDP of the CPU is largely irrelevant if battery life is the goal. You can crank the power down on any Intel system, but you’re still going to get shit battery life of the CPU can’t return to idle.
Older AMD Ryzen chips got amazing battery life at any load. But they’ve been following intel’s race to idle as quickly as possible and battery life at low-mid loads has suffered dramatically. ARM cpus are much better in that regard.
The Zen3+ Ryzens all have lower threshold power modes, it's just that the dupes tuning a lot of BIOS presets have all the settings whacked out to run them at variable settings. If you get a well tuned BIOS, you get good battery life. The Linux 6.8+ governor settings also allow all individual core engagement with governors, which had a 40-60% battery life boost for some Ryzen chips. The 8000's should perform even better.