We use cookies to provide you with a better experience. If you continue to use this site, we'll assume you're happy with this. Alternatively, click here to find out how to manage these cookies

hide cookie message

Laptop batteries explained

Inside each laptop battery is a complex combination of chemicals and circuitry all designed to provide the mobile energy you need to get work done.

On the face of it laptop batteries might seem a little bit dull, but there’s all sorts of technology hidden within and they are more powerful and last longer than ever before. Inside each laptop battery is a complex combination of chemicals and circuitry all designed to provide the mobile energy you need to get work done.

Laptops use Lithium-ion batteries that have several advantages; they’re relatively lightweight, hold their charge well when not in use and tend to have a longer overall lifespan than rival technologies. One of the main advantages of Lithium-ion batteries is that they can be left on charge and even benefit from being charged when they are only half depleted. This is great as it means you don’t have to worry about over-charging the battery or damaging its performance.

Batteries are made up of cells and as you might expect the fewer cells the shorter the battery life. Naturally, the more cells a battery has the heavier it is so there are compromises to be made. You can get a long-lasting battery, but it’ll be heavier and add considerable heft to your laptop, for example.

The life of any laptop battery is finite and the more you use it and older it becomes the less charge it will hold. As long as you are careful and manage your batteries properly you can get many years’ life out of them. In fact, your batteries will be useful long after the laptop you get has been made obsolete.

Dell has a really handy explainer on laptop batteries, how to choose the right one for your needs and what the advantages are to each one.

Visit the Dell Tech Zone for more advice on family computing.

IDG UK Sites

Samsung Galaxy S6 release date, features and specs rumours: When will the Galaxy S6 come out?

IDG UK Sites

Why people aren't upgrading to iOS 8: new features are for power users, not the average Joe

IDG UK Sites

Free rocket & space sounds: NASA launches archive of interstellar audio on SoundCloud

IDG UK Sites

iPad Air 2 review: Insanely fast and alarmingly thin. Speed tests, camera tests, beautiful...