It was listed as a new battery in the original packaging, but it held only a 20% charge, making it worthless to me. “In other words,” explains Laptop Battery Express’s DuBois, “shop ...

User-replaceable laptop batteries used to be common. You could even carry a second one for more juice. Now, though, it's uncommon to see them. Here's why.

The lithium-ion battery in your Mac laptop will lose its ability to charge to its maximum factory-made capacity over time. But you don’t have to take it lying down. Depending on the level ...

It’s a fact of life that sooner or later, every laptop battery hits old age. Most do well for between 18 and 36 months, depending on how heavily they’re used. Then they slip into a slow ...