The difference in voltage discharge curves between alkaline and lithium batteries explains why their performance can vary dramatically in certain devices. If you've ever experienced a lithium AA ...

[Ray’s] breadboard power supply lets you drain the last traces of power from ‘dead’ AA batteries. Electronics that are powered off of disposable alkaline batteries have a cutoff voltage that ...

Is anyone giving or receiving a holiday gift labeled "batteries not included"? We thought so. Listen up: We tested 15 AA batteries—the type typically used in digital cameras, flashlights ...

Presidents’ Day sales are in full swing now that we’re a week away, and we found so many hot new deals to share. Laptops from ...

Put a set of our Best Buy AA disposable batteries in your most power-hungry devices and they'll last more than three hours longer than the worst. For AAA batteries, our Best Buys last an hour and a ...

The following rechargeable batteries are all top-notch and available in AA and AAA models. Keep reading to discover our favorite rechargeable batteries, including affordable bulk packs and ...

Our evaluation included extensive discharge tests to find long-lasting alkaline batteries -- including AA, AAA, C, D and 9-volt options. We also considered the cost per battery for each option to ...

And one of the most interesting gadgets at CES 2025 was the Olight Ostation X. The Ostation X is a AA battery charger, but it might be the smartest and most convenient charger ever created.