so i've been looking at extra batteries. for the Canon 450d it takes an LP-E5 which is 7.4v and 1080mah looking at replacements on ebay they come in 1080mah, 1200mah, and even 2000mah but, all are still 7.4v now, when i competed in car audio, high amperage was a great thing, and we paid dearly for it. (my competition batteries were over 500 each) when i raced r/c cars the same held true. same voltage, higher amperage, got us longer run time and faster speeds, but, lower amperage generally got us more torque. of course, i'm referring to AGM car batteries, and Nicd rechargeable. any noticeable difference between amperage? and more importantly, any risk of damage from a higher or lower amperage?