I'm with the first posters to this thread. I use all nicads, and I only discharge (cycle) once a year in the spring to check the packs to see how good they are. The rest of the year they are on trickle charge and right after flying for any length of time they go on an overnight charge, then back to trickle. I've never had a problem with maintaining my packs this way. I also like Ace battery management products. I have lots of Auto Add a trickles, a Digipace II, and I just got a Super Digipulse. I love all of their units.