4.0 amp hour battery runtime shrinking each week.

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We've been using our mower since May and have been loving it! The last couple of weeks I've noticed the  4.0 amp hour battery is only lasting about 30 minutes or enough to do the backyard plus half the front. We used to be able to finish the whole yard on one charge. Any thoughts as to why the battery life would suddenly shorten?
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Posted 5 years ago

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SCDC, Champion

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Official Response
Hi chad,

Is it warmer outside than usual? My battery times drop a bit with heat. In the middle of the day and temps in the 90's I will get 30 minutes. As the temps drop into the 80's I'm getting about 45 minutes. Also, if you have a thicker lawn, or letting it grow longer before cuts, the higher load to run the mower will affect run times.

Some battery tips, don't fully recharge your battery after you are done, charge 2 lights worth and pull it. Store inside. Charge up when you are ready to mow. Also, try not to fully drain then charge your battery. These new lithium ion batteries aren't like the old nicad types, where you were encouraged to fully drain and charge the batteries. Though I love going all battery, I do realize that they do have diminishing returns.

I would call support if none of the thing above are relevant to your situation. Who knows, you may have a battery issue creeping up. Thankfully we have the three year warranty on them. ;)