NOVELTY - The energy device has rechargeable lithium cell and energy conversion component such as inverter that are provided within a casing (103). An energy generation component generates harvestable energy. A connection point is adapted to connect energy users, energy sources and other energy share packs simultaneously for sharing energy. The power ports are adapted to communicate data, and are operated simultaneously at different voltage levels.    USE - Energy device worn by soldier, industrial worker, police officer, and foriPhone (RTM: internet and multimedia enabled smart phone), ipod (RTM: portable music player manufactured by Apple company), cell phone, tablet, satellite system, radar jammer and vehicle.    ADVANTAGE - The batteries can be carried by the soldier conveniently fit while fitting in natural shape of wearer body, multiple equipment can be operated at different voltage levels from a single common battery, battery pack or energy system and the reconfigurable battery pack and power system can allow the user to combine batteries in a wide variety of ways to provide the exact voltage, current, capacity, size, weight and form factor that the user requires at that time. The size and shape of existing armor plates can be mimicked to reuse the existing pouches and attachment devices already in use by the military for such armor plates, such that the soldiers do not have to re-distribute and reconfigure their load carriage system when deciding to carry more energy or more armor into a specific mission. If the soldier is in a situation where they need increased speed and mobility, the soldiers can drop exhausted energy share packs from their body, so as to reduce the burden, while retaining the energy share packs that have the most energy remaining.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an energy system.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the single energy share pack.    Energy share pack (100)    Connectors (101,102)    Casing (103)    Display (104)