This is a practical battery for MacBook Air 13" A1245 A1237. Under normal circumstances, the more cells decide the greater mAh. With 4 cells, this battery will satisfy your demand. It could give you the portability and efficiency during using especially when you are outdoors. And this battery will certainly make your laptop regain energy by the use of the high capacity battery. It provides you with the strong battery life, which is great to solve the problems of the short life and poor performance. With fine workmanship and strict examination, this battery is up to standard that you can trustingly use it without any worry.<!--Features --><p>FEATURES</p><UL><LI>You can get long hours of battery life without having to frequently plug into recharge with it</LI><LI>Using advanced cell technology and quality parts, it guarantees the stamina to meet your need of long work sessions and travel</LI><LI>Manufactured to the highest quality available with true enhanced performance</LI><LI>Powered by high quality cells</LI><LI>Can be charged while it is installed and the computer is connected to AC power &nbsp;</LI></UL><!--Specifications --><p>Specifications</p><TABLE class=ke-zeroborder border=0><TBODY><TR><TD>Dimensions</TD><TD>11.29 x 4.72 x 0.28" / 20.7 x 12 x 0.7 cm (L x W x H)</TD></TR><TR><TD>Weight</TD><TD>13.12 oz / 372 g</TD></TR><TR><TD>Color</TD><TD>Black</TD></TR><TR><TD>Voltage</TD><TD>7.2V</TD></TR><TR><TD>Capacity</TD><TD>37Wh</TD></TR><TR><TD>Battery Type</TD><TD>Li-ion Polymer Battery</TD></TR><TR><TD>Cell</TD><TD>4 cell</TD></TR><TR><TD>Compatible with</TD><TD>MacBook Air 13" A1237&nbsp; MacBook Air 13" A1304&nbsp; MacBook Air 13" MB003<BR>MacBook Air 13" MB003J/A&nbsp; MacBook Air 13" MB003LL/A&nbsp; MacBook Air 13" MB003TA/A<BR>MacBook Air 13" MB003X/A&nbsp; MacBook Air 13" MB003ZP/A&nbsp;MacBook Air 13" MC233*/A<BR>MacBook Air 13" MC233CH/A&nbsp;MacBook Air 13" MC233LL/A&nbsp; MacBook Air 13" MC233TA/A<BR>MacBook Air 13" MC233X/A&nbsp; MacBook Air 13" MC233ZP/A&nbsp; MacBook Air 13" MC234*/A<BR>MacBook Air 13" MC234CH/A&nbsp; MacBook Air 13" MC234LL/A&nbsp; MacBook Air 13" MC234TA/A<BR>MacBook Air 13" MC234X/A&nbsp; MacBook Air 13" MC234ZP/A&nbsp; MacBook Air 13" Z0FS</TD></TR><TR><TD>replace part numbers</TD><TD>A1245</TD></TR></TBODY></TABLE><!--Package Includes --><p>Package Includes</p><ul><li>1 x Battery</li></ul><!--Extra Info --><!--produts_compatibility -->