Folded, the Mobi Fold is a 2.2-by-2.5-inch slab under an inch thick and barely two ounces — pocket or coin-purse territory — yet it snaps open into a full-size 4.75-inch mouse that fills the hand instead of forcing you onto a laptop trackpad. Its headline trick is charging: a single one-minute USB-C top-up buys about 22 hours of use, so a dead mouse is never more than a coffee refill away. It Easy-Switches across three devices over Bluetooth; $79.99, in graphite, lilac, off-white, or sand.