Frayed connections A bloated, warped, or bulging battery Cracks in the battery’s casing
Note that some newer battery chargers may have adjustable Amp-hours. [3] X Research source
For older batteries, use an hour as a rule of thumb. Overcharging can damage your battery and cause dangerous fumes to leak. So, if your charger isn’t automatic, it’s especially important to unplug on time.
Be aware that sparking, shocks, and explosions are all unlikely, but possible. Make sure to wear thick gloves and use protective glasses. If you’re able, opt for a battery charger instead. [9] X Research source
Before you proceed, remove tripping hazards from your area. Locate jumper cables. To use jumper cables, you’ll need both ends to comfortably reach the lawn more and car battery at once. Before moving on, check that your vehicles are close enough to do this.
Before moving on, check to make sure both connections are tight and secure.
This helps ground the electrical circuit. Because sparks can occur when attaching that last clamp, you want this to happen far from flammable hydrogen gas. So to be safe, hook your final clamp to your mower’s metal frame instead.
As you turn your mower on, expect to see a few sparks. If your jumpstart worked, you’ll hear the lawn mower’s engine turn over. If this doesn’t work right away, give your mower a few more minutes to charge.
As you’re disconnecting your clamps, make sure you set them where they won’t come into contact with other metal. Once you’re done disconnecting, drive your lawn mower around for ~30 minutes. This will recharge your battery. [16] X Research source
