OT: low power replacement for a optical mouse for my beaglebone


To make my beaglebone really mobile I want to attach a mouse to it.

I looked for notebook mice in the internet but only found optical
ones often with wireless support. Both features "eat" power.

Are there other "things", which can be used as a mouse (beside
the touchscreen of the LCD7 cape) for this purpose which have a
lower power consumption -- I am out of ideas?

Thank you very much in advance for any help!
Best regards,

Did you forget about regular ball mice? Track balls? External track pads have been available since the 90s too. What’s the application? If you need a mouse then I’m assuming you have a screen to. If that’s the case then the power draw of the mouse is the least of your worries.