Introducing Briggs & Stratton InStart® lithium-ion electric starting engine. Our easiest starting engine-ever. InStart is the world’s first walk-behind lawn mower engine to combine the power of gas and the starting reliability of lithium-ion battery technology. Unlike traditional lead acid batteries, the InStart lithium-ion battery last up to 3 times longer and can provide enough power to meet the needs of most homeowners for an entire season on a single charge. It charges fully in one hour delivering up to 75 starts, or ten minutes of rapid recharging provides up to 20 starts. InStart has the power you need with the reliable starting you want. New for 2016: Optional feature includes Just Check & Add™, never change the oil!