Rodney, not to be argumentive, but I'm not seeing the self discharge you are stating on Ni-Mh batteries. I have two 9CAP transmitters, one is my backup and the other is flown three times a week on average. I orginally had 1000mah Ni-Cads in them and if I didn't charge overnight they wouldn't be near topped off when I went to fly, even if they had been the day before. This was a real pain as I live near the coast and fog to mid day is not uncommon, so I almost had to charge every night even if I didn't get to fly every day.

I switched over to 2300Mah Ni-Mh batterys and now, I can leave the transmitter in the trunk for a week or more and still be good for flying all day. The standby transmitter hasn't been charged in near four months and it is showing 10.1V this morning. It has no flight time on it so it is all self discharge time. My other hasn't been charged in over four weeks and has maybe eight flights on it. It is also showing 10.1V.

I did a little Excel work and if the discharge rate was 0.1% of the previous days charge, starting with a 11V charge, it would take 85 days to drop to the 10.1V stage. At 1%, it would be there in 10 days. I am guessing as I don't remember the exact day I charged the standby, but it looks as if the self discharge rate is close to 0.075% a day. That would put me at the 10.1V at 115 days of shelf life and still have a couple day flying avaible. Aint bad

Don