Why are stock accessories of gadgets better and more durable than replacement accessories?

[Fidelia]

It has come to my observation that accessories that came with gadgets and devices at the point of purchase are always better in performance and last longer than the ones that we buy to replace these accessories when they get damaged.

Is it because these stock accessories are made by the company that make the gadgets, it is better in quality?

 

[King Belieal]

I think it might have more to do with compatibility related issues. The accessories from the manufacturers of a gadget are tailor made for that gadget. Usage of the accessory with the gadget doesn't wear out the accessories that much as third party accessories.

 

[neku]

Most manufacturers offer a warranty on their products so they use better quality components which will last for a longer time. In contrast, often there is no warranty on the replacement parts.