A method for operating a device charging system having a plurality of carts, each cart having a battery, a processor and at least one switching and conditioning circuit, the plurality of carts physically coupled in a mutual and external charging configuration, wherein, under the control of a plurality of processors, the plurality of switching and conditioning circuits condition, switch and route the electrical signal within and between each cart among the plurality of carts. The electrical signal may be switched, routed or conditioned based on semantic analysis. A first cart includes a socket connector which may include an electrical or latching component, and which may be physically connected or latched to secure it with a pairing socket connector of a second cart.