When it comes to replacing a laptop battery, there are several factors to consider. Nearly all modern laptops use a lithium-ion battery, but some, especially older models, use a NiMH or Ni-Cad battery. To determine which laptop battery you have, turn off and unplug your laptop and then remove the battery to look at it. You can also check the specifications on the top or bottom of the battery.
You can choose between buying a branded laptop battery, such as the one that comes with your laptop, or a generic replacement one. Branded batteries tend to be more expensive than generic batteries, so if you compare a branded laptop battery and a generic one and find that they are very similar, then you might want to go for the generic one. Many laptop manufacturers provide details on their website what batteries they use their laptops for, including model and part numbers. When buying a replacement battery, you should consider several factors, such as price, warranty, compatibility, and capacity.
Many have downloadable software that can check if the battery has been recalled, which eliminates the need to remove the battery from the laptop to check it. Pay close attention to the warranty; what happens in a situation of approximately one in a million where a battery overheats or otherwise damages the laptop? To make sure that one works with your computer, you'll need to know the make and model number of your laptop; if you don't know it out of the blue or don't have the necessary documentation, check the inside of the laptop's battery compartment while it's turned off and unplugged. Additionally, some third-party batteries even promise to hold a longer charge than branded ones. Regardless of the type of laptop battery you purchase, you must ensure that the cells are manufactured in a way that meets international laptop battery safety standards, such as those designated by Underwriters Laboratories (UL).
If your battery is on the recall list, contact the laptop manufacturer to have it replaced as soon as possible.