The project makes the USB port a convenient source of power for devices such as battery charger for a pair of AA Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) cells. The USB standard specifies ...

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When it comes to helping a car with a dead battery, there are two approaches to take – a portable jump starter or a battery charger. Both of these products bring your battery (and car) back to life by ...

️ Editor's note: This article was updated with new information in December 2025. Dead batteries are a predictable reality for any car that spends more time parked than driven. Battery discharge does ...

The above circuit can be useful to detect if the load of any battery charger or plug-in adapter supply is not properly connected. The load can be a set of batteries to be charged or any other type of ...

A couple of decades ago, having a dead battery usually meant pulling out jumper cables and hoping your friendly neighbor (if you didn't own a secondary car) would be kind enough to give you a jolt to ...

Few Canadian drivers ever thought of needing a battery maintainer just a few years back, but with the multitude of electronics and computer modules packed into today’s vehicles, all drawing power to ...

Over the past few weeks we've looked at handy OBD-II monitors, flexible hose clamp pliers and screw-holding screwdrivers that make dropping screws less likely. This week's tool, a desulfator battery ...