hello--the original battery in my 09 stallion is a"power volt" manuf by interstate batteries. i was informed that this battery is an "economical" variety.i replaced it with a auto zone 51 R DLG (dura last gold) -- 3year replacement & 8 year pro rated warranty. it is a perfect fit into the battery holder. 51 designates battery size,R indicates + lug on right side--same as original. NO charge for this info!! ride safe & warm