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 ...

[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.

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 ...

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.

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 ...

Can I charge my phone with a weaker charger? Yes, it will just take longer. Is fast charging bad for my phone's battery? No, but it also depends. Phones are supplied with batteries designed for ...

Deals on portable chargers and power banks are surprisingly good this Prime Big Deal Days event. The Anker 633 MagGo Battery for $40 off on Amazon is a personal favorite thanks to its charging ...

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 ...

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 ...