Provided is a jump starting device for boosting a depleted or discharged battery having a positive terminal and negative terminal, including a battery device including multiple battery cells connected together in series, a positive battery connector for connecting the positive terminal of the battery device to the positive terminal of the depleted or discharge battery, a negative battery connector for connecting the negative terminal of the battery device battery to the negative terminal of the depleted or discharged battery, and electronics in circuit with the battery device, positive battery connector, and negative battery connector, the electronic configured for selectively connecting at least one or more battery cells of the battery device to the depleted or discharge battery in a normal boost mode or in an enhanced boost mode.