Ring’s popular Battery Doorbell Plus is currently on sale for $100, down from its regular price of $150 – that’s a solid 33% ...

A giant battery-powered dual-zone refrigerator / freezer on wheels.

The upcoming EverFrost 2 electric cooler runs for up to 52 hours on a single charge, and this can be extended to 104 hours with a second battery pack.

Besides warning me while I’m at home that someone’s opened the door, the sensor also gives me peace of mind when I’m away that nobody’s entering the house when they shouldn’t be–a key issue, given ...