I agree. Logitech makes some products with replaceable batteries: I have an Ergo M575 trackball (their low-cost trackball) and it uses a single AA battery that

I agree. Logitech makes some products with replaceable batteries: I have an Ergo M575 trackball (their low-cost trackball) and it uses a single AA battery that lasts over a year for me when being used daily at work. https://www.logitech.com/en-us/products/mice/m575-ergo-wireless-trackball.910-005868.html https://www.logitech.com/en-us/products/mice/m575-ergo-wirel...