Regarding Battery. Yes the Megi kernel prevent you from charging it fully up to 100%. Only 80% on Phosh or 89% on Lomiri. You may want to read-up on how a PinePhone can be a risk and what can be done to prevent it.
https://twitter.com/ManjaroLinux/status/1331640617265410055
So I’m happy testing Lomiri on battery to see what we may get. Phosh on the other hand needs more power in terms on how you configure it. Lomiri is mostly programmed to save battery all the time: