The laptop power adapter on your HP/Compaq laptops takes power from the wall outlet and turns it into power your laptop battery can use to charge. If you notice your battery isn't charging or is doing so slowly, it may be the power adapter. The power adapter is also easy to lose, especially if there are multiple laptops in your home, so it is sometimes necessary to buy a replacement. This replacement part matches the specs of the original and is compatible with the 324815-001 325112-001 laptops. Have your laptop charging like new again and even take it with you on those long vacations to always have an adapter to charge with.