The Ultimate Guide to Lawnmower Battery Maintenance.
Photo by Gunnar Ridderström on Unsplash
Keeping your lawn looking fresh and tidy starts with a well-functioning lawnmower—and that means taking good care of its battery. Whether you own a cordless electric mower or a ride-on model, proper lawnmower battery maintenance can save you money, time, and hassle in the long run.
In this guide, we’ll break down how to care for your lawnmower battery, troubleshoot common issues, and extend its lifespan with a few simple steps.
Why Lawnmower Battery Maintenance Matters
Your lawnmower's battery is its power source. Without proper maintenance, it can wear out quickly, leading to expensive replacements and inconvenient downtime.
Benefits of regular battery maintenance include:
Improved mower performance
Longer battery lifespan
Fewer unexpected failures
Better energy efficiency
Understand Your Lawnmower Battery Type
There are a few different types of lawnmower batteries, including:
Lithium-ion (Li-ion) - Common in modern electric mowers, they’re lightweight and fast-charging.
Lead-acid - Often used in riding mowers; more affordable but heavier and require more maintenance.
Nickel-cadmium (NiCd) - Less common today but still found in older models.
Each type has its own maintenance needs, so always consult your mower’s manual for specific guidelines.
Keep the Battery Charged—But Not Overcharged
One of the easiest ways to extend battery life is to maintain a healthy charge cycle, here are some of the best practices:
Charge the battery after each use.
Avoid letting the battery fully discharge.
Use the charger that came with your lawnmower.
Unplug the charger once the battery is full - overcharging can shorten lifespan.
Store the Battery Properly
When mowing season ends, storing your battery correctly is crucial, here’s some top tips:
Store in a cool, dry place (ideally between 4°C and 20°C).
Avoid direct sunlight or damp areas.
Disconnect the battery from the mower if possible.
Check the charge every 4–6 weeks during storage.
Clean the Battery and Terminals
Corrosion or dirt can hinder performance. Make it a habit to check and clean the battery regularly.
Use a soft brush or cloth to wipe away debris.
For corrosion on terminals (common with lead-acid batteries), use a mix of baking soda and water with a toothbrush.
Dry thoroughly before reconnecting.
Inspect for Wear and Tear
Regular inspections can help you catch problems early. Look out for:
Cracks or swelling in the battery case
Leaks (especially in lead-acid batteries)
Loose or corroded connections
Reduced run time or difficulty starting the mower
If any of these appear, it may be time to replace the battery.
Use the Mower Correctly
How you use your lawnmower impacts battery life.
Don’t mow wet or overly tall grass (requires more power).
Sharpen mower blades to reduce strain.
Avoid frequent stop-and-starts.
Let the battery cool before recharging after heavy use.
Final Thoughts
By following these lawnmower battery maintenance tips, you’ll get the most out of your equipment and enjoy smoother mowing seasons. A little care goes a long way, keeping your battery healthy means fewer headaches and a lawn that always looks its best.