All cordless and handheld Dyson vacuum cleaners use rechargeable lithium-ion batteries. Lithium-ion batteries have a higher energy density than standard nickel-cadmium batteries, so they work for longer periods without requiring a recharge.
A fully charged, battery-operated Dyson vacuum delivers up to 20 minutes of run time. Each vacuum has a trigger that prevents battery power from draining when the vacuum is not in use.
Lithium-ion batteries are low-maintenance and require no periodic discharges to prolong their life. The batteries also have a low self-discharge rate, and they cause little harm when disposed of because they include no free lithium metal.