Device-specific batteries

Device-specific batteries are replacement batteries made to fit one particular phone, tablet, laptop or other mobile device model. They suit anyone whose device no longer lasts a full day, or has started to shut down unexpectedly.

Matching the exact model number matters more than any other detail when choosing one.

How to choose a device-specific battery

Model number. Check the full model number of your device, usually printed on the back, under the battery cover or in the settings menu. Names such as the marketing title of a phone are not enough, because several variants with different batteries can share one name.

Capacity. Capacity is shown in mAh for phones and tablets and in Wh for most laptops. Choose a value close to the original rating. A figure far above it on a low-cost battery is often exaggerated, and it will not deliver the extra hours it promises.

Original or compatible. Original batteries match the manufacturer's specification and usually fit and report charge level correctly. Compatible batteries from other makers can cost less, but look for clear model compatibility lists and safety markings such as CE.

Fitting method. Some batteries clip in by hand, while others are glued inside a sealed case and need a heat pad, small screwdrivers and plastic opening tools. If your device is the sealed type, a battery supplied with a tool kit saves a separate purchase, and a repair shop is a sensible option if you are unsure.

Battery types you will find

• Original equipment batteries: made to the device maker's specification, so capacity, connector and charge reporting normally match the battery that came with the device.
• Compatible third-party batteries: built to fit the same models as the original, often at a lower cost, with quality depending heavily on the maker and its cell sourcing.
• Batteries with installation kits: sold with opening tools, adhesive strips or screwdrivers, which matter for phones and tablets with sealed housings.

Before ordering, read the product listing for the manufacturer name and the list of compatible models.

Device-specific batteries: frequently asked questions

How do I know which battery fits my device?

Use the exact model number of your device and compare it with the compatibility list on the product page. The number is normally on the back of the device, on a label under the old battery or in the about section of the settings. If the listing does not mention your model, the battery is probably not suitable.

Can I replace the battery myself?

It depends on how the device is built. Many older phones and laptops have removable or screw-fixed batteries that most people can change in a few minutes. Newer sealed devices need careful opening, so a repair technician is the safer route if you have not done it before.

Is a higher mAh battery always better?

No, a higher figure is only useful if the battery is genuine in rating and designed for your device. A battery with a much larger claimed capacity than the original can be physically unable to fit, or may simply be mislabelled. Staying close to the original capacity usually gives the most predictable result.

How do I know when to replace my battery?

Replace it when the device drains quickly, switches off at a charge level well above zero or runs noticeably hot while charging. A swollen battery that lifts the screen or back panel needs replacing straight away and the device should be switched off and kept away from heat. Gradual loss of battery life over a couple of years is normal and is the most common reason for a replacement.