You are only purchasing the BLUE PROTECTIVE SAFETY cover around the battery. This will NOT fit around the IAKB0014 8Ah battery (you need to buy the larger 15Ah Peg Perego 12 volt Battery Replacement ) and does NOT include the blue wire harness connector. You must re-use the blue connector wire from the IABK0501 or the IABK0014 if you are upgrading. We have a 12 volt 15Ah battery that will fit in this blue protective safety cover that offers 25% to nearly 100% longer run time than the OEM 12Ah and 8Ah battery. To learn more have a look at our tutorial regarding broken covers and how to replace these batteries .