I have successfully done a repair of this battery, although I do not reccomend this to anyone that has little to no repair experience. If you are willing to do this and are skilled enough to, my advice would be just take your sweet time with the battery. It is flimsy and damaged easily so just be extra careful while doing this replacement. Lord Adhesive really put up a fight for this replacement!
[guide|110038|iFixit Replacement Guide]
[product|IF301-030|MacBook Battery]