These occupy the middle ground between the cordless items and the monstrous professional compressed air stuff... this isn't about brute force though and mine has worked out fine for me.

Huini 12V Cordless Ratchet Wrench, 3/8" Electric Ratchet Wrench Kit 40N.m, 0-300 RPM,Impact Drive Ratchet Rattle Nut Gun with 2 x Lithium-Ion 1.5Ah Battery...
4.0

Cordless Impact Wrench,1/2" Brushless Power Impact Gun,2500RPM Electric Wrench, Max Torque 550N.m with 4 Sockets, 12PCS Screwdriver Bits, 4.0Ah Battery &...
4.0

WORKPRO Cordless Ratchet Wrench Set, 3/8" Cordless Ratchet with 7 Sockets, Extension Bar & Drive Adapter, 1H Fast Charger, 12V Powered Ratchet Wrench 55N.m...
5.0