It can last for several years, if you take proper care and maintenance along with replacing the rechargeable battery (whenever it is dead/not working). If your blower has lithium-ion battery, which can be expected to last for 2 – 3 years (OR) around 400 – 500 charges.  If blower having nickel cadmium-based battery then it last longer for over 1500 – 1800 charging cycles. A few best brands of cordless leaf blowers like Worx, DeWalt, Makita, Black + Decker, & Husqvarna will provide the best battery options to buy alone. So, simply keep either a spare battery or replace it whenever needed to complete your task.