- This Envy is equipped with a cordless lithium-ion powered battery for long-lasting power. It features up to 2 hours of run time and charges in 90 minutes or less. Super light weight – it weighs less than 10 oz. It is perfect for all day, ergonomic use that won’t weigh you down. The Envy has a cord or cordless operation option for reliable power to last you all day long. The blade is size 000 to 1. 11 plastic attachment combs included (1/16″ to 1″).