Brandon, I know you're trying to help and for that thanks. However, there isn't anything out there you've tested? Sure you can Series 3 x 18650 LiFePO4 batteries, in that case I'll use my regular 18650's instead. Certainly in 'testing' you guys looked into non-LiPo batteries, didn't you? There are no 'small' packs, just LiPo's and a few at that. Instead, most LiFePO4 packs are 30 mm minimum LxWxH cube minimum or are silly in length. e.g. 137 mm (~5.4") and larger. Examples 3S LiFePO4 packs - http://www.hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?idCategory=218&LiPoConfig=3&sortlist=&CatSortOrder=desc --------------------------------- A. $13.77 ZIPPY Flightmax 1800mAh 3S1P 30C LiFePo4 Pack ; 54A link - http://www.hobbyking.com/hobbyking/store/__14061__ZIPPY_Flightmax_1800mAh_3S1P_30C_LiFePo4_Pack.html Dimensions: 137mm x 45mm x 16mm B. $17.88 Turnigy nano-tech 2100mAh 3S1P 20~40C LiFePo4 Transmitter Pack ; 42A link - http://www.hobbyking.com/hobbyking/store/__23815__Turnigy_nano_tech_2100mAh_3S1P_20_40C_LiFePo4_Transmitter_Pack_.html Dimensions: 97 x 30 x 30mm C. $15.50 ZIPPY Flightmax 2100mAh 3S1P 30C LiFePo4 Pack ; 63A link - http://www.hobbyking.com/hobbyking/store/__14064__ZIPPY_Flightmax_2100mAh_3S1P_30C_LiFePo4_Pack.html Dimensions: 137mm x 45mm x 17mm 137mm = 5.4"