it is nice to have battery powered, but what you will do after a battery collapse and Festool change the battery. It happens all the time. You anyway cannot run it without the line. If you use it in shop plug or extension cable is there. Are you it outside all the time where no plug is available?
Corded will last longer then Festool and you too.
Battery + charger are much more larger and heavier than one cable. Spare the spece in the systainer for some other things..
Jigsaw always requres addition work due to un-accurate angle (blade bends and it is not depend of blade or manufacturer) of the cut and cut quality too. They are nearly never final cut. This is why i did not invest a lot in such machine. My old Bosch is good enough..
Festool runs on 18 V and 14 V too (if you have, and you have to have and different charger for 14 V - my assumption only)
I had an idea to get somehow adapter for 110/18V (like one for walkman style) and make it conected to the Carvex after battery go to the ..
Just my study before i canceled my order on it.
What are your reasons for the battery one, Might be I can change my opinion.