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John Deere Replacement Part Lawn Mower Battery Keeps Dying

The lawn mowersmall engine often has a separate model number. Use the small engine model number for a complete list of symptoms and parts. Watch our model # lookup video for help finding the model number.

L111/42in Deck/Engine: 441577-0113-E1

The part(s) or condition(s) listed below for the symptom Lawn mower battery keeps dying are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Lawn mower battery keeps dying

Cause 1Alternator

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.

Parts
Alternator for your John Deere Replacement PartLawn Mower
Alternator - Part # 2994088 Mfg Part # 592829

Alternator (Tri Circuit or 5/9 Amp Regulated)

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Cause 2Voltage Regulator

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.

Parts
Voltage Regulator for your John Deere Replacement PartLawn Mower
Voltage Regulator - Part # 2692331 Mfg Part # 845907

Briggs & Stratton voltage regulator. 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 may keep draining quickly.

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