How Long Do Robot Mower Batteries Last?
TL;DR: Robot mower lithium-ion batteries last 3-5 years before noticeable capacity loss. Most maintain 80%+ capacity for 500-800 charge cycles.
Robot mower lithium-ion batteries last 3-5 years before noticeable capacity loss. Most maintain 80%+ capacity for 500-800 charge cycles. At one charge per day during a 7-month mowing season, that is roughly 210 cycles per year, giving you 2.5-4 years of peak performance.
After that, you will notice shorter run times. Replacement batteries cost $150-400 depending on the model. Some manufacturers offer battery replacement programs.
The rest of the mower (motors, frame, electronics) typically lasts 7-10 years.
| Component | Expected Lifespan | Replacement Cost |
|---|---|---|
| Battery | 3-5 years | $150-400 |
| Blades | 1-3 months each | $15-25/pack |
| Wheels/motors | 7-10 years | $50-100 each |
| Main board | 7-10+ years | Usually not replaceable |
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