Specifications of Battery: Voltage: 20V Capacity: 3500mAh Type: Li-ion Gross weight: 400g Specifications of Charger: Input voltage: 100-240V Input current: 0.8A Fit Voltage: 18V Output: 21V/1.5A Type: Li-ion Compatible Battery: Worx: WA3551.1 Applicable Machines: Worx: WG169, WG179E, WG259, WG259E.9, WG549, WG549E.5, WG549E.9, WX166, WX166.31, WX372, WX390, WX390.1, WX393.3, WX523, WX523.9, WX678 Tips for Battery: The battery is suggested to be charge and discharge three times first to get the best performance. The battery should keep cool down before charging. Tips for Charger: LED light stays red: Being charged LED light stays green: Fully charged LED light flashes red: Poor or reverse connection, high temperature etc.
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