I have a stock Brushed mini E-Revo, and I am using the included 1,100 mah battery. I also purchased a 1,600 mah battery to have as an extra. I also bought the $30 Prophet Sport charger to charge my batteries (which I do at 1 amp, and takes approx. 1.5 hours). Without upgrading my stock parts or charger, what battery will give me the most run time? I'm ok with the current speed I'm getting.