First, let’s clear the air: Optimate is not Optima. The former is a European-engineered brand of battery chargers; the latter is a maker of those red-and-yellow AGM batteries you’ve probably seen in ...

The OptiMate 3 is a small and compact motorcycle battery charger. It is claimed to have the ability to de-sulfate batteries in addition to its normal battery maintenance charging duties. UPDATE: See ...

The Optimate 4 has several microprocessor controlled stages that analyze, desulfate and charge motorcycle and automobile batteries. I evaluated and reviewed the Optimate 3 only a few months ago in the ...

The 8 best solar battery chargers for your car, phone, boat, RV, and more! Many of the devices that we depend on throughout the day run on batteries and it’s never fun when those batteries run down. A ...

Add Yahoo as a preferred source to see more of our stories on Google. Woman in climbing gear looking at bright sun shining over mountain range The best solar chargers are great for keeping your phone, ...

Here is the simple circuit to charge 6 V, 4.5 Ah rechargeable Lead-acid battery from the solar panel. This is a simple solar battery charger circuit designed using LM317 voltage regulator and is used ...

Extra batteries and portable power banks are great for keeping your electronic devices charged and operating when you’re off the grid, but they won’t last forever. Portable solar chargers don’t have ...

Editor's note: An update made on January 18, 2023, on charger performance and availability three years after this story's original airing, follows the main story. When outlets are nowhere in sight, a ...

When you’re camping, backpacking, taking long day hikes, or simply sitting around your fire pit in the backyard, the closest outlet is likely farther away than your power cable can stretch. Pack a ...

Convenient battery charger with automatic function and clever charging tech to rescue ‘dead’ batteries Battery chargers. They’re all the same, right? Not quite, it seems. If you’ve tried to use one of ...