I've got some old cords that have a micro-usb port on one end and a wall plug on the other. These are for charging mobile phones I used to have. Should I toss them or save them for future phones I'll ...

Universal Serial Bus, or USB, is a common connection used in many devices, from smartphones, laptops to everyday gadgets. It allows data transfer, device charging, and even video output. USB ports are ...

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We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Sarah Witman Sarah Witman is a writer focused on batteries and charging ...