The new battery is physically larger, so the old bottom cannot accommodate it.

Oh right but if I want to keep everything but the chassis I can, correct ?

	▲	_-_-__-_-_- 2 hours ago \| parent [-]
		This page has more details, https://frame.work/laptop13pro?tab=upgrade-to-pro. You can keep everything, but they are selling some of the new parts as a kit.