Far outlasts the NiCads and charge faster too, even charges the old nicads faster. I have 5 old 19.2 nicads and 2 new lithiums the 2 lithiums outlast the 5 nicads put together (probably about 1 li-ion to 3 or 4 nicads) and then some, plus they have more power to start with. Gonna buy more nicads as soon as the wife lets me.