They are referring to the issue with the 11th gen where the system will not power on due to a depleted RTC battery. Strangely a charged RTC battery is required to power on the machine and said battery will only charge (very slowly) when connected to mains power. Officially this is weeks to months of being unplugged however deep discharges and or bad battery connects have cause some to experience it after a few days. Viability of an ML 1220 rechargable battery for RTC | CMOS (11th gen) - #43 by nrp
Looks to me like the exact same design but the spec is upped from 3.3 to 3.5 kg but time will tell.
Very happy to see FW are addressing the complaints/desires users have expressed, the live event was genuinely so exciting I literally was saying “well done Framework”. That said I still hope we see improved durability of design in general.