I pick up one of these to use as a Rx batt in a glow powered plane with 6 standard size servos and a retract servo. I bought the 1100mah first and seemed to work fine, but from the advice of a fellow flyer of glow planes, I went with this one. kind of long but thin and is not that heavy. It fit down in my fuselage fine. Will soon find out how may flights on a charge? I was told I could could get 6 to 8 flight before you need a charge. great price. and valuehobbys shipping is super fast!!,