Portable energy storage products are innovative solutions concepted to keep your electronic devices powered when traditional power sources aren't available.These little guys are mainly designed for off-grid charging, functioning as mobile power banks and giving desperate thirst to your smartphone, tablet or laptopTechnological features include advanced battery cells with high energy density, enabling greater use between charges, and sophisticated circuitry that protects against both overcharging and short-circuiting--making them safer as well as more robust systems in operation beyond leakage.At outdoor adventures or at remote worksites, prepare for emergencies and life off the grid, people could apply them wherever possible.With wide varieties of output such as USB, AC sockets and DC connections,the power storage devices can meet all kinds of power needs there may be.