Background

• Different laptop sizes, battery types and connectors result in there being many variations between laptop adapter types. Even different laptop models from the same manufacturer will often use different power adapters.
  
  

Identification

• Laptop power supplies usually have a model number. It is important to make sure you use the correct type, as it will match the voltage required by your computer. Manufacturers' websites usually provide a chart or other tools to ensure you select the correct adapter. Just because a power cable fits, it does not necessarily mean it is the correct model.
  
  

Alternative

• Some third party companies manufacture "universal" power adapters. If you choose to use one of these devices, be extremely careful that the voltage and amps are set correctly. It is also wise to check with your manufacturer that using this kind of adapter will not affect your warranty. It is always best to use the correct adapter for your laptop.