Old thread , but I can't leave incorrect information lie!
My father wrote the warning you see on the back of LiPo batteries and I have owned 100s of LiPos, that said.....
You should NEVER put your Lipos away "fully charged"!
The Hyperion EOS0606i mentioned here has a storage charge/discharge function, it's called "STORE MODE". Select STORE MODE and set your amp setting to match your LiPo. If you have say a 3000mAh LiPo set the STORE MODE amp setting to
3-Amps, if say a 5000mAh then set your STORE MODE amp setting to 5-Amps. This is a 1C charge rate and safe for most all LiPo batteries used in the RC World. Next set your cell count to match your LiPo , example 2s for a 2cell 7.4volt or 3s for a 3 cell 11.1volt. Start STORE MODE and the Hyperion EOS0606i will do the rest. Don't leave the charger unattended!
As for the Stampede you must check your front AND rear differentials as well as all the ball bearings in the transmission system from front to back. You will definitely find something amiss! Clean, DRY, and lube bearings with proper ball bearing oil or at least machine oil.
If you have aftermarket alloy CVD shafts check the set screw is tight, if not add loctite and tighten, allow to dry.