Your phone is running out of battery - do you go for the built-in USB port or your car's "cigarette lighter?" Here's which is faster and what you should know.

We test and review what we think is the best car battery tester, plus other options at different price points at AutoGuide.com.

Music streamers are a convenient and versatile one-box solution for getting high-quality digital music from multiple online sources.

The fridge can be plugged in at home or into a 12V car power supply. Also cool: The front of the fridge is made of tempered glass and you can jot notes on it and then erase them — similar to a ...

A new ripple feedback filter is presented for analog/digital mixed-mode amplifier (MMA) among audio applications. MMA is composed of two amplifiers: one is analog amplifier responsible for high ...

Buying a car battery can be daunting, but our experts have rounded up the best choices on the market in 2025. Find out what we recommend and why.