We have been using the NiMh cells for our bot the poast two years. I was curious to see if anyone has used the LiFePo4 batteries before? I need something that can deal with a high amp draw due to the use of a mamba monster 2650kv. We melted our old battery but I thought it was due to it being from bad cells. Would LiFePo4's be a better alternative for finals if I can get the money?