might not seem like allot to most of the people on here but ive been using a kr8 for awhile, have one xl battery ive been using then my mom ordered a kr8 kit and gave up on it and gave me 2 more batteries, and i ordered a riva 901 kit earlier today ( first upgrade from a slim battery) so ill have two of thoughs! thats 5 batteries two of which will probably last me all day each, feel like i have to much even though the back ups will be nice i guess.