from what im gathering and im new to this.A shuriken sk-bt80 is 80Ah and 1900CA which is supposed to be good for bout 1800 watts or so. dont quote me on it tho. jus like a shuriken sk-bt120 is a 120 Ah 2600CA batt and its good for 2400 watts according to SHURIKEN >> http://shurikenonline.com/products.html <<