Replace:
Worx WA3551.1 WA3551WA3516 WA3549.1
Note:
It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery.
For transport safety, our batteries are not fully charged before leave the factory.
After use, please charge the battery after cooling.
Technical Specifications:
Fit for identical batteries: ( Please search with "Ctrl+F" )
Worx WA3551.1 WA3551WA3516 WA3549.1
Charging Indicator LED light:
Flashing red: bad connected, high temperature or reverse connect
If your battery getting too old and cant take a charge or can not run after charge, then you need a new battery, not charger problem.