We use genuine Deans connectors for this service. We will no longer change batteries originally EC5 to Deans. This is a service we are providing to customers to change the plug of batteries. The price is for each pack. If you have different batteries in the order, please leave a note in the message box to indicate what batteries need to be modified. Please allow 1-2 working days for us to get the job done. This service fee will not be refunded.