where have a good website to buy a Dell laptop battery for my laptop?

Question:I need to buy a new battery for my Dell laptop battery and the batteries on the Dell website are expensive and was wondering if there was another reliable website where I can purchase a new battery and adapter. And how do you know if a website really does sell OEM parts? Answer:You will run the risk of buying a dead battery no matter where you buy it from since a lot of ‘new’ batteries are ‘new’ old stock and Li-Ion batteries age even when they are in storage:Acer BATCL50L battery , Acer BTP-43D1 battery , Acer BTP-550P battery , Acer BTP-63D1 battery , Acer BTP-39D1 battery , Acer BTP-34A1 battery , Acer BTP-25DI battery