Product(WG753) NITRO 40V CORDLESS 21" SELF-PROPELLED LAWN MOWER WITH BRUSHLESS MOTOR AND REAR WHEEL DRIVEContinuous flashing light on the battery charger indicator
(WG753) NITRO 40V CORDLESS 21" SELF-PROPELLED LAWN MOWER WITH BRUSHLESS MOTOR AND REAR WHEEL DRIVE

Continuous flashing light on the battery charger indicator

Try this solution

Reinsert the batteries

Try reinserting the batteries into the charger.

Possible Cause:
The batteries may not be properly seated.