Much like universal battery packs for power tools, the Power Pack allows you to quickly change and share batteries across all Kaivac battery-enabled systems. The go-anywhere capability improves worker productivity while eliminating the hassle of cord maintenance, making it perfect for day cleaning and other noise and trip sensitive cleaning process. Overcharge protection, automatic shutdown and other advanced features maximize battery life. Easy-to-read onboard gauge lets users know how much battery charge is left. Stack batteries on a single OmniFlex system to extend range.