Still getting things ready to go after a 2+ year break... I pulled this 12 year old Hangar 9 Twist .40 down, and put it on the Accu-Cycle. It was stored on my "red-neck" battery maintenance system for the last couple of years... That consists of a conventional 50 mAH charger connected to a Christmas tree timer. I have it come on for 30 minutes/day, and then back off. I never bothered to check it, other than to verify that the charge light was still coming on when the timer was passing power. So far, it looks as if the 5 cell 1500 mAH battery is fine. One more cycle to verify, then on to the next bird. So far, so good!