The black and decker pd1820lf dustbuster flexi hand vac uses 18 volt lithium ion battery technology for strong suction and fade free power it is a high performance cordless hand vac with integrated 15m flexible hose helping you to clean those hard to reach awkward spaces it has a cyclonic action and triple action filtration allows the product to perform better and last longer the eco smart charge in under 4 hours and the charger automatically turns off once the unit is fully charged saving elec