Screwdrivers use their own batteries, I have four of them and the batteries still work fine, but the mechanism that powers the atty has died. The bodies no longer appear to be available anywhere. The others, some lasted months, others were DOA. A Riva 901 can last from 6 seconds to 6 months IME. That I've just had three in a row that won't turn on or charge is unbelievable. The 901 ones all use the same atomisers and carts, and the Screwdriver is a 901 fitting.