I went through amazon.com to replace my MacBook pro 15" lithium battery. First mistake. Second mistake was thinking that you could find a mac battery for less than $150. The battery I ordered was advertised as an Apple macbook 15" lithium battery. Upon delivery, I discovered it was in fact a cheap knock off. Fine, name brand is not a big deal to me. But this battery wouldn't even fit in my computer! And when I contacted the seller, I discovered I couldn't return the battery because it's illegal to ship lithium batteries overseas if you don't own a company. Very disappointed and and angry. If even one person decides not to buy from batteryprovider.com because of my experience, I will rejoice.