of you can pick up some elite lipos at
www.cheapbatterypacks.com they only offer up to 4800mah (only a slight difference in runtime with a 5000mah pack) but they are pretty cheap and at 25c i believe they are a steal....i've got two of teh 5s 4800 lipo in my muggy and they work far better than any maxamps pack i got.....and i 5th linc's quote as well.....