Specifications of Battery: Voltage: 18V Capacity: 4000mAh Type: Li-ion Gross weight: 387g Specifications of Charger: Input voltage: 100-240V Input current: 0.8A Fit Voltage: 18V Output: 21V/1.5A Type: Li-ion Compatible Battery: WORX: WA3512.1, WA3512 Applicable Machines: WORX: WG151, WG151.5, WG151s, WG151E, WG155, WG155.5, WG155s, WG251, WG251.5, WG251s, WG255, WG540, WG540.5, WG540s, WG890, WG891, WG180, WG170.1, WG170, WG166.1, WG166, WG165, WG163, WG160.4, WG160.3, WG160.2, WG160.1, WG160, WG157, WG156, WU287, WU381, WX163.
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