I read the 2013 has .5 kwh more than the 2012 battery, but I dropped a 2013 battery took the cover off it and it looks identical to a battery I replaced from a 2012. Even the BECMs look the same. Zone 1, 2 and 3 are identical with stickers of Kwh. I'm tempted to replace this 2013 with the 2012 battery pack system that i have already cell balanced to see if it will work after reprogramming. Has anyone attempted this before with success or is a failure waiting to happen.