I bought this as a replacement charger for my hp laptop. This is the second replacement I've bought, the previous one was cheaper but stopped working due to the mains cable not fitting the transformer box properly. This Charger seems much better. The mains cable has a solid fit in the transformer box and the cable itself seems to be better quality, though time will tell if it stands up to regular use. The charger provides sufficient power to run the laptop and charge the battery. I'm very happy so far!