Townpeak Laptop Battery for Apple A1331 A1342 Unibody MacBook, MacBook Air MC234LL/A MC233LL/A 13.3-Inch (only for 2011 & 2012 version)+Two Free Screwdrivers , also fits MC375LL/A [Li-Polymer 6-cell 10.95V-63.5Wh]

I bought this for my Late 2009 13" Unibody Mac Book. I did my research and believed this battery would fit. It does state "13" unibody macbook".After undoing my current battery I found that this one was just a little to "chunky" to get in, we are talking millimetres, but in the mac world thats huge. I couldn't get the battery to fit, the original battery slid in very easily, leaving me to believe that this battery is not manufactured to the exact standards.Disappointing. Have tried another brand.

fitted perfectly thank you