[bdebde]

Medium to slow speed tend to heat up the ESC faster. After 10 - 15 min the 5700 is too hot, and that is about how long the 3800 li/mn batt lasts. I get 15 to 20 min runtime with the 4600, so if you want longer run times, go 4600. I even have a hard time getting the 4600 up to full speed, without a large parking lot.