Oled for sure I have 2 lcd steam decks one for my son 256 and my 512 I gave my wife. The difference in battery, the joysticks, better thermals, and screen are worth it.

I have taken the 512 q2 steam deck apart several times to fix various issues with the og design. They took all the major complaints and addressed them mine included.

Sounds like a bad battery to me if it’s only lasting for an hour or less.