nospam wrote:

the two logitech mice in the example *you* gave below have a difference
of 17 grams.

Yep, you keep wanting to omit battery weight. Very consistent.

yes, it's tiny, and with that brings compromises, but you were only
focused on weight, not run time or anything else. no goalpost moving
allowed.

Which was your tactic: compare miniature with normal size, and don't
compare same-size mice using different technologies.

it definitely does not weigh 'far more'.

It does once you add the batteries.

there is no need for a bluetooth dongle since bluetooth is built into
most laptops and many desktops.

Whoosh. I was being complete in calculating the actual weight of ONLY
the Bluetooth mouse. The USB transceiver dongle *is* included with the
Bluetooth mouse whether you use it or not.

however, if the dongle weight is included, then the mouse weighs less
than the specs claim.

Yep, my point you regurgitated. I *deducted* the weight of the dongle
to show the weight of the Bluetooth mouse was less; however, after
adding batteries, the Bluetooth mouse is 121 grams, not 81 grams. You
have some magical way to make Bluetooth mice work without batteries?