Originally Posted by kalmon
I can explain it. You get what you pay for! For the most part I only buy ThunderPower batteries for all my planes and Helis. They cost 3x as much but last 10x as long. They have a warranty and even if you crash and destroy the pack they'll sell you a replacement at 50% price. The Nanos work, but will usually fade sooner than any of the quality packs out there.
to be honest i wish i could go ahead and buy thunderpower.. but man!!! 4000mah 4s $100 dollars? my wife will KILL ME!