Just a quick question from a computer idiot. My Toshiba Satellite laptop needs a new battery. On the front, next to the keyboard there's a label that tells me the laptop is a Satellite C660/C660D When I remove the battery and look on that it tells me the model number is C660-2EV When I look online for a replacement, I see, for example, that Amazon.es sell a Toshiba battery for a C660 with no mention of the -2EV My question is, should I buy the battery marked as a C660? I might add that there is quite a marked difference in price from Amazon say and Duracell for the same battery. Hope someone can advise me in my ignorance.