I also put a voltwatch on every plane, I bought a nice little stick (it was .061 I made it .074) from a friend,I didnt realize there even was a battery in it until I had to move the tank,,so I charge it up..I had the plane for 6 months.. it charges up fine but after one 5 minute flight the voltwatch is down by half...so I discharge the battery by electric motor and recharge for several hours and it holds the charge fine, but still after 1 5 minute flight is down into the unsafe area on the voltwatch....that batttery will be replaced before the next flight...Rog