For seasoned or newly indoctrinated Sun Joe and Snow Joe cordless users, having a supplemental iON EcoSharp Lithium-Ion Battery is never a bad idea. With no fade-power and no memory effect, regardless how long you charge the battery or how much power it has before you do, it will always give you maximum performance.FeaturesLithium-Ion technology made of high capacity cells with no-fade power for maximum job performanceReliable performance with 4 Ah capacity providing 25 - 40 mins. of whisper-quiet running timeFuel gauge indicator lights let you easily monitor your battery's charge capacity while it is in useCompatible with all Snow Joe and Sun Joe cordless iON modelsETL approved90 day warrantyIncludesiON 40V 4.0 Ah EcoSharp Lithium-Ion Battery - iBAT40SpecificationsSeries: iONBattery Amp Hours: 4.0 AhBattery Style: SlideBattery Type: Li-IonCompatible Chargers: ICHRG40Compatible Models: Sun Joe and Snow Joe iON DevicesRecharge Time: 2 - 3.5 hrs.Voltage: 40V