When your battery powered lawn mower refuses to start, the first suspect is always the battery. While it is true that the lawn mower batteries are to blame, this does not necessarily mean that you have to go out and buy a replacement battery immediately.
Lawn mower batteries, on average, should last you between 2 to 4 seasons. If your battery is younger, try to recharge it. If it won't take the charge, that's the time you get a replacement battery. If your battery is younger than 2 seasons old and refuses to take a charge, check for a defect on the battery or on the voltage regulator of your lawn mower.
To recharge a battery, here's what you need to do:
1. Get your battery charger and lawn mower ready. The best thing is if you can have your battery charger and lawn mower in the same area. Plug the battery charger into the outlet and use an extension power cord if it helps. However, if it's really not possible to have your charger next to your lawn mower, then you will have to remove the battery from the lawn mower to charge it.
2. Locate the battery. In riding lawn mowers, the batteries are often found under the seat. In walk behind lawn mowers, the battery may be found behind the deck. If you are not sure where the battery is in your lawn mower, check the manual for its location.
3. If you need to remove the battery, first remove the straps that keep it in place. Then remove the cables hooked on to the battery. Use a wrench and gently ease out the battery from the casing.
4. If you can charge the battery without having to remove it from the casing, simply remove the cables on the battery.
5. Hook the battery charger to your battery. Attach the red cable to the red terminal on the battery and the black cable to the black terminal of the battery. Set the charger to start charging.
6. Do not leave the battery on the charger for too long. Consult your manual to find out how long your battery should be charged. Overcharging can damage the battery and shorted its useful life.
7. When charging is complete, switch off the charger and remove the cables. Replace the battery into the lawn mower if necessary.
8. Re-attach the cables from the lawn mower, making sure to put the right cable on the right terminal. Replace the safety straps. Close the hatch and start your lawn mower to see if the battery is working.
In case when you do need to change the battery, the steps to change the battery are as follows:
1. Locate the battery. If you are not sure where the battery is located, consult the manual of your lawn mower.
2. Remove the battery. Remove the safety straps that hold your battery in place. And then remove the cables from the terminal. Using a wrench, gently ease out the battery from its compartment.
3. Replace the battery. Put the new battery in the compartment. Attach the cables to the correct terminals and snap the safety straps back in. Cover the compartment and your new battery is good to go.