Hot swapping batteries in a mobile device

A battery, comprising:

• a housing comprising a top, a bottom, and lateral edges, the lateral edges comprising a top side, a bottom side, a right side and a left side;
• a plurality of contact pins located on one or more of the top and bottom;
• the top side comprising a substantially flat contact rail;
• and
• the bottom side comprising a substantially flat contact rail;
• wherein the plurality of contact pins comprise charging pins;
• and
• wherein each of the substantially flat contact rails comprise discharging rails.

An electronic device, comprising:

• a housing with a recess defined therein by an upper wail, a lower wall, and a planar surface between the upper wall and the lower wall, wherein the planar surface comprises a plurality of pins;
• said housing being open on lateral sides of said recess;
• a processor disposed within the housing;
• a locking mechanism located at the planar surface and securing a battery in the recess when operated;
• a first contact rail;
• and
• a second contact rail;
• wherein the first contact rail and the second contact rail are operatively coupled to the processor;
• wherein the first contact rail is disposed at or on a surface selected from the group of surfaces consisting of:
• the upper wall and the planar surface adjacent to the upper wall;
• and
• wherein the second contact rail is disposed at or on a surface selected from the group of surfaces consisting of:
• the lower wall and the planar surface adjacent to the lower wall.