How Long Do Robot Lawn Mowers Last?

A robot mower is a big purchase, so how long it lasts matters. The honest answer is that makers expect years of use, but most wire-free models are only a few seasons old, so long-term proof is thin. Here is what the makers say, what warranties cover, and what you can do.

What makers say

Ecovacs' guidance is typical: around 5 to 10 years for the mower with good care, 3 to 5 years for the battery, and blades that wear out in weeks rather than years. We haven't found independent long-term data for the newest wire-free models yet, so treat these as estimates.

Warranties: the firmer guide

The parts that wear

• Blades. The fastest-wearing part. Ecovacs says 4 to 6 weeks; Dreame suggests about once a year or every 25 hours of cutting. Replace all blades and screws together when the cut turns ragged. Sets cost about $24 to $49 at Navimow's and Mammotion's US stores.
• Battery. Signs of wear are shorter runs and more frequent charging. Lymow rates its LiFePO4 battery for 2,000 cycles; Ecovacs says its GOAT batteries keep over 70% capacity after 1,000 cycles.
• Wheels and sensors. Mud and grass build up; clean them regularly.

Care that extends life

1. Clean it. Brush clippings off the deck and blades; wipe LiDAR every 1–2 weeks and cameras every 2–4 weeks with a dry cloth, as Ecovacs suggests. Avoid high-pressure water unless your manual allows it.
2. Respect the limits. Keeping it within its slope and lawn-size ratings reduces strain on motors and wheels.
3. Store it for winter. Indoors, cool and dry, with the station's position marked for spring.
4. Charge sensibly. Extreme temperatures shorten battery life; many mowers pause charging when it's too hot or cold.
5. Keep firmware updated for bug fixes, and register the mower for warranty.

See our guide to whether robot mowers are worth it for what those parts cost over five years.