Duracell DPP-300EP Compact enough.

Compact and well designed, worked as expected. There is some buzzing noise when the inverter is in use, but not noticable in daytime. The gauge on the compressor has a too-wide(for ordinary family cars) range from 0 to 250 psi. The LED flash light is not wired one and has small batteries inside, so not so bright as expected. The Power on switch has a lamp inside and the 4-level battery level indicator with LEDs, good for camping. Certainly not for heavy motorized tools. > Twenty holes with a hammer drill consumed a half of the battery.