I used one all summer long. Was able to fly for days without a recharge. I then got a Hobbico Hydrimax battery and noticed the Hydrimax seemed to have a lot more 'life' to it - faster, stronger responses. I put the T-energy battery in a plane with ONE digital servo, and the Voltwatch goes from highest green to lowest red with ANY stick input. This is on a plane with a brand new switch and no servo extensions (happens when wings are off, too, so only 3 servos operating). This leads me to believe that the batteries are NOT rated for high current draw. They might be OK for use with standard analog servos but I would NOT suggest them for anything else.