This is a great NEW Heavy Duty Interstate Battery, Made In the U.S.A.,12 volt battery that is heavy duty due to the 525 cranking amps. ONE out of SIX commercial batteries sold today is an Interstate brand battery! PINNACLE Technology keeps your new Interstate battery working overtime, providing power and endurance over your long haul. Interstate Batteries are guaranteed "factory fresh" at the time of purchase and our receipt-free warranties are backed coast to coast. Get your Porsche 356 back on the road with the best battery made for your Porsche. If you have converted your Porsche 356A, 356B, or 356C to a 12 volt system then this is the battery you need to make it fit and work perfectly. This will also work on Porsche 911 & 912 from '65-69. There is a $25.00 battery recycling fee included in the shipping price, which if we get your old any 12 volt battery back we can refund you the recycling fee.