My attic home office stays pretty chilly if the temperatures are low outside, even with a space heater running ... a hand ...

This lozenge shaped device is not only a USB power bank that can keep your mobile devices topped up, but is also doubles as a miniature heater that ... until the 4,000 mAh battery runs down.

Now thanks to developments in battery technology, rechargeable batteries can significantly reduce this e-waste pile. I tested and ranked the best rechargeable batteries of 2025 to help you get top ...