Upgraded! The Calnaga Battery Set now includes a trunk mount battery box and the Optima Spiral Cell AGM. These batteries are square, complete, and have detail that isn't possible with the injection molding process. Check the top post detail and side terminals. Six different batteries are included in the set: Universal maintenance-free battery, universal heavy duty battery, Autolite Sta-ful, a small 12-volt for OEM compacts and tuners, the battery box, and the spiral cell.