[Eggmont] was facing this dilemma with a Makita battery from a broken angle grinder and decided to make a USB charger out of it. [Eggmont] took the simplistic approach, using an old cigarette ...

If you’re making the switch to rechargeables, you’ll need a charger to keep them powered. The Panasonic Eneloop BQ-CC55 is small and compact, and charges up to four batteries at once.

Solar battery chargers address these issues by keeping your car battery topped up with a steady supply of free and environmentally friendly energy. But do they work and which solar charger is the ...

Winter is the toughest time of the year for your car’s battery, so having a good battery charger ready to go when a helping hand is needed is a worthwhile precaution. Today’s electronics ...

This is a 1.25A battery charger that is designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects often found with trickle chargers. Included with ...

There’s a strong case for dedicated motorcycle battery chargers. Most batteries will become discharged if the bike is left alone for a period of time (sometimes as little as a couple of weeks ...

But if these batteries are rechargeable, you need a charger. That’s where [Jon]’s entry for the Hackaday Prize comes in handy. It’s a small, cheap charger for LIR2032 and other rechargeable ...

Is your phone, tablet, or laptop typically in the battery red zone before the day's end? These portable chargers and power banks give you the most boost when you're out of juice. I’m a Mobile ...

Battery chargers are used to recharge batteries which, after discharge, can be restored to a fully-charged state. Rechargeable batteries or secondary cells differ in terms of design and chemistry.

These days, "small" portable batteries have a capacity of around 5,000mAh, which means they easily fit into your pocket and still have enough power to fully top up your phone once. Meanwhile ...

Want to charge your iPhone more quickly? Check out our favorite fast iPhone chargers to top off your battery in a flash. I’m one of PCMag’s mobile analysts. That means I check out phones ...