Compact 65W Universal Laptop Adapter... The mCube Mini revolutionizes the traditional laptop power adapter. Designed to maximize portability, the mCube Mini can be powered by any 12V or 15V cigarette lighter socket in cars and airplanes, as well as any EmPower aviatic socket. The mCube Mini can charge laptops requiring up to 65 watts power at 15-21 volts, so you can stay powered anywhere, anytime.