CHARGE ON THE GO FROM HOME OR IN THE CARREADY TO USE COMES PRE-CHARGED OUT OF THE BOXEASY TO USE JUST PLUG IT IN FOR INSTANT POWERMAINTAINS CHARGE FOR UP TO 1 YEARENERGY STAR(R) CERTIFIED WITH FULL-CHARGE AUTO SHUTOFFRECHARGEABLE UP TO 500 TIMES3-YEAR LIMITED WARRANTYUPC : 856575002839Shipping Dimensions : 7.00in X 4.65in X 2.00inEstimated Shipping Weight : 0.6