Ditto on the Nimh batteries. there ok for a small four or five servo plane with little draw non digital servos. I have lost many planes to Nimh and brownouts on spectrum dsm2 and only use a 5 cell if it is Nimh. I will use a 4 cell for ignition systems on gas engines. I only fly Life batteries on anything worth more then 50 bucks. dual batteries on the larger planes. there price is worth the insurance. Blake