I have a 2 year old Dell Inspiron laptop, and I need a new battery for it. I'm not sure how long I plan to keep the laptop, so I would rather not spend $135 for a Dell battery. There are several non-OEM batteries on ebay (many from China, some from the US) that run around $50 with shipping. The sellers have good feedback and offer a 6 month warantee. They seem too cheap to be any good. Are there any other options?