Exactly.

U can use a 8s on a savage 2350, but company says only 4s, Are they ill...NO!

The fact is that just plugging the battery and giving a little throttle is a lot different fromdoing hogh performance runs with that battery, the electronics wont blow if u run a 3s for one time with easy throttle, but wont last long. You can run a 3s on sparrowhawk Bl, but it will drastically reduce the life of electronics and then the noobs will complain of TTr quality being bad. The fact is that you dont know what is the limit.

In short, a 3s will do for hig pseed runs for 1-2 times, but regular 3s will kill your ESC and Motor Magnets within Weeks!