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 ...

For AAA batteries, our Best Buys last an hour and a half longer than the worst. In a medium-drain device, you'll get an amazing 14 extra hours from our Best Buy AAs, and four additional hours from our ...

A decent set of rechargeable AA batteries are a must-have for photographers, especially for powering speedlights and wireless commanders. Rechargeables offer several advantages—they’re more ...

The most popular type of primary batteries are alkaline batteries with a market share of 80% among the primary battery market. These batteries have a typical voltage of 1.5V and a shelf life of 5-10 ...

Jan. 27, 2025 — Lithium-air batteries have the potential to outstrip conventional lithium-ion batteries by storing significantly more energy at the same weight. However, their high-performance ...

'ZDNET Recommends': What exactly does it mean? ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. We gather data from the best available sources ...

It's easy to replace your iPhone's battery and it can give your phone a brand new lease on life. Andrew is CNET's go-to guy for product coverage and lead photographer for Europe. When not testing ...

Electric car battery life is one of the main concerns for those interested in buying an EV. Most electric cars use lithium-ion batteries – the same as the ones in your laptop or smartphone – and these ...

Since we often rely on our mobile devices to shop, communicate, travel, and more, it's paramount to keep our phones' batteries charged. However, most of us can't stay tethered to a wall outlet.

It’s unknown whether alkaline water can help treat or prevent cancer. Theory says it’s because cancer cells thrive in an acidic environment. But too much may have health consequences.

If you had asked me a few years ago what I considered to be the weakness of modern smartphones compared to older phones, I'd have said the battery. When you look at phones from before modern ...