[charlieboardman]

From what I can ascertain, the new bigger battery is incompatible with the old chassis: https://frame.work/products/pro-battery-74wh

"This product can only be used with both the Framework Laptop 13 Pro Bottom Cover and Framework Laptop 13 Pro Input Cover."

I applaud that the mainboard and keyboard are backwards compatible, but I don't think the pro is quite as backwards compatible as some are thinking

[josephsw]

They actually call out this specific incompatibility in the video here (at 2m44s): https://www.youtube.com/watch?v=JSxgCEpkiKM&t=2m44s

Mainly just a trade-off because of because of the bigger battery (but it sounds like they'll sell you the bottom chassis pieces as well).

[cbsmith]

Yup. Sounds right. Interestingly though, you can use the new input cover with the older frames.