Stay completely untethered from the wall with our high capacity 1600 mAh rechargeable lithium ion battery which provides up to two hours of continuous cordless operation on a single charge This powerful battery ensures that you have the freedom to pump while moving around the house playing with your baby or even while traveling in a car without worrying about power outlets or extension cords The lightweight design of the battery unit makes it incredibly easy to carry in a standard diaper bag providing the ultimate convenience for active mothers who refuse to let a busy schedule stop them