Product Details】Battery type: lithium batteryVoltage: 20 voltsCapacity: 6000mAhReplace OEM P/N:WA3551 WA3551.1 WA3553 WA3553.1 WA3553.2 WA3641 and other series batteriesCompatible Models: (Please use "Ctrl+F")WX386 WX386.9 WX550.1 WX550.9 WX384.1WX166.3 WX176 WX178.9 WX279 WX279.9 WX290.9 WX290.9 WX390 WX367 WX550 WX176 WX373 WX390The package contains:1 X 5.0Ah BL1830 battery replacement part for batteries 2 X 5.0Ah BL1830 battery replacement part for Worx 20V battery 1 X 6.0Ah BL1830 battery replacement part for Worx 20V battery 2 X 6.0Ah BL1830 Battery Replacement Parts for Worx 20V BatteryNotice:【Battery characteristics】:20V, 5Ah, 6Ah, lithium ion has no memory effect. CE, FCC, PSE, RoHS safety certification. True capacity, more powerful than normal batteries, ideal replacement for Worx WA3553 old original batteries.【Be especially careful! ]:This product has overcharge protection, but not overdischarge protection. If you do not want to shorten the life of the product, please stop using it when the battery is low. Running out of electricity is prohibited.【Safe and reliable】:The product is authorized and certified, reliable and safe. A qualified battery can provide a powerful backup for your tools and help increase your productivity.