Abstract: A negative electrode and a battery employing the same are provided. The negative electrode includes a negative electrode active layer and a protective layer. The protective layer is disposed on the negative electrode active layer, wherein the protective layer includes a nanopowder and a binder. The nanopowder has a specific surface area of 30 m2/g to 1,000 m2/g. The nanopowder has a binding energy less than or equal to ?2.5 eV. The weight ratio of the nanopowder to the binder is from 51:49 to 99:1. The nanopowder is a compound having a structure represented by Formula (I) MiXj??Formula (I) wherein M is Al, Mg, Zr, Zn, or Si, and X is O or N; i is 1, 2 or 3, and j is 1, 2, 3 or 4.

Abstract: A pushbutton switch includes a shell body, a resilient member, and a movable unit movable relative to the shell body between an upper limit position and a lower limit position. The movable unit includes a drive member and an electrical contact member driven by the drive member to move between a plurality of contact positions and a plurality of non-contact positions. The drive member has a plurality of inclined rod-engaging surfaces. When the movable unit is moved from the upper limit position to the lower limit position, one of the rod-engaging surfaces moves on a guide rod of the shell body, thereby resulting in rotation of the drive member relative to the shell body so as to covert the electrical contact member between the contact positions and the non-contact positions.