If your Worx lawn mower battery keeps dying, start with the battery itself, because a bad cell is the most common reason a lawn mower battery will not stay charged. Charge it fully with a charger first. If it still will not hold a charge, the battery is likely defective and needs to be replaced. If the battery checks out, move to the charger. A weak or failed charger can cause a mower battery not charging problem, so test the charger’s voltage output with a multimeter and make sure the outlet has power and has not tripped a breaker. Next, check the alternator, which should supply voltage while the mower is running and recharge the battery at the same time. If the alternator output is low, your Worx riding lawn mower charging problem may continue no matter how new the battery is. Finally, inspect the voltage regulator, since it controls how much charging voltage reaches the battery. If it fails, the lawn mower battery drains quickly. Enter your model number on RepairClinic.com to find the exact Worx battery, charger, alternator, or voltage regulator for your mower.
01 - Worx Battery
One or more cells in the battery may be dead. Try charging the battery with a battery charger. If the battery still won't hold a charge, this indicates that the battery is defective and will need to be replaced.
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To determine if the charger is defective, use a multimeter to test the charger for proper voltage output. In addition, test the outlet used by the charger, and ensure that the outlet has not tripped a breaker.
The alternator provides voltage to the lawn mower while the engine is running and also recharges the battery. To determine if the alternator is defective, use a multimeter to test the alternator voltage output according to the wiring diagram.
While the engine is running, the voltage regulator sends the proper amount of voltage from the alternator to the battery to keep the battery charged. If the voltage regulator is defective, the battery won't receive enough voltage, causing the battery to drain quickly.