KSC55 Festool is not for construction, but for fine furniture, ...
There are better battery options for construction where accuracy is +/- 1" or so.
- HKC Festool use 1x18V battery, so you have to have 1 spare all the time, and that battery is interchangeable with other Festool tool (jig saw, KSC55 saw, ...)
- KSS400 Mafell 1x36V battery, and this battery cannot be used on any Festool tool. Check the price $$$$$$$.
Which of that two = personal preference, both will over-last you
There are better battery options for construction where accuracy is +/- 1" or so.
- HKC Festool use 1x18V battery, so you have to have 1 spare all the time, and that battery is interchangeable with other Festool tool (jig saw, KSC55 saw, ...)
- KSS400 Mafell 1x36V battery, and this battery cannot be used on any Festool tool. Check the price $$$$$$$.
Which of that two = personal preference, both will over-last you