Charger for part # VACBP36V. The Atrix Battery Backpack is perfect for cleaning confined areas and where corded electric vacuums are not a viable option. The battery feature eliminates all safety hazards that corded equipment may cause. Users are granted the freedom to clean anywhere such as on scaffolding, entry ways, attics, or in stairwells. The VACBP36V has a continuous run time of 50-55 minutes and features a convenient on/off switch which allows users to power down between work stations and extend battery life.