Bought these for my Mini E revo they fit perfectly with enough room to tuck the balance connector into the battery cavity. I have another Lipo that is rated at 2000 mah and 25C that seems to discharge at a higher rate than these. I really don't know whether my G force batteries are over rated or if the other pack is under rated but there is a slight difference. Run time compared to my 2000 MAH battery is significantly better (other pack is older) but I am guessing I get about a 50%-75% increase of run time. Inexpensive shipping great quality you can't go wrong ..seriously