#battery

This blower / vacuum in one from VIOLEWORKS has 1500 W power and up to 20,000 RPM. We have a coupon in the CZ warehouse

This is probably the cheapest foldable fan with its own battery: it has up to 4 speed settings and a price right around €40

The 21 V WZTO cordless screwdriver has a max torque of 25 Nm, 2 batteries, its own case, and a coupon price in the EU warehouse