Sodium-ion batteries show promise as a cheaper, more resilient alternative to lithium-ion technology, but achieving market ...

Flint's flexible, rechargeable paper batteries could one day replace their lithium-ion counterparts in your smartwatch ...

The DeWalt 20V Max 4Ah Lithium Ion Battery is on sale for only $51, which is a whopping 70% off the original $169 price tag.

Jeff Reeves writes about investments, the stock market, exchange-traded funds and retirement topics. A veteran journalist with extensive capital markets experience, Jeff has covered Wall Street ...

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 ...