Advice from Lenovo on laptop computers says batteries wear out faster when kept fully charged. When laptops are on chargers, a special mode is available not to keep the battery full.
[attachment=0]

- LenovoBattry.JPG (60.45 Kio) Vu 2398 fois
[/attachment]
Robots are designed to be kept fully charged so ready for use with maximum capacity at any time. Their batteries then wear out faster than desired. There appears to be a trade off with convenience as well as issues of simplicity in use. More attention could reveal alternatives without all loss of convenience. Battery costs are a concern of customers (Samsung batteries, very large, cost $175).