This multi-power-tool could be useful for both big and small projects. There's no cord to restrict you, just make sure you've charged the battery.
From Tooled Up
Makita TM30D 12v Max CXT Cordless Multi Tool 2 x 2ah Li-ion Charger Case
Amazon
Makita TM30DWAE 12V Max Li-ion CXT Multi Tool Complete with 2 x 2.0 Ah Li-ion Batteries and Charger Supplied in a Carry Case
ITS
Makita TM30DWAE 12V CXT Multi Tool with 2x 2.0Ah Batteries, Charger & Case