Review Content Handy to have You need to purchase this extra battery if you own the heated stadium seat. If the games goes into overtime and your battery runs out, its a real bummer. Its just so convenient to have THE CLUB SEAT I LOVE MY NEW STATIUM SEAT,I HAVE TWO GRANDSONS THAT PLAY HOCKEY IT IS ALWAYS SO COLD INSIDE BUT MY SEAT AND MASSAGER KEEP ME SNUG AS A BUG. I TRULY REC0MENT THIS PRODUCT TO EVERYONE .I LOVE IT..... Excellent Product I USE THIS PRODUCT WHILE AT SPORTING EVENTS. Spare Battery ! Really thinking about buying another unit for the house, and my Jeep ! Ive found a use for my office chair, and to carry around in my Jeep for all round uses . . . . Its not a Luxury Accessory, its a Requirement This is a replacement for a lost battery. Grandpa uses his heated stadium seat all the time. He enjoys the seat back and the heated seat, especially in some of the colder hockey arenas in Saskatchewan, Canada. Best gift ever!