Hey, don't get me wrong, Patrick. Long before most of the R/C world knew that Lithium could run ECU's in addition to treating manic-depressive illness, I was into them. Had one in my full scale plane(not re-chargeable) powering my Emergency Locator, until the FAA banned them due to fires and explosions, over-reaction on their part, of course. Now back to Alkalines with a 2 year shelf life, rather than 10 year of the lithiums----talk about progress. Leave it to the feds.

I actually have tried one of the original Tadiran Duralites from Canada in one of my light weight prop planes 2 yrs ago. Li-Ion is actually old technology, dating to the early 90's. Actually modified a Radio Shack power supply into a CVCC charger. That has been replaced by my new UltraDuo 30 which does a great job on Li charging. Worked fine, but that 600 mah pack lasted about 1 month until I forgot to turn off the rx(no low voltage cutoff on it). Shortly after that, that original run of Israeli Tadiran Duralites disappeared as you probably know, and I kinda lost interest, although for a while, Rich Fong, myself, and a few others experimented with tearing apart camera and computer batteries in search of substitutes. I tried to find those old thread, but they seem to be lost. So been there.............

Johnny Hernandez has been using them successfully for a long time.

I also have used nothing but Li in my laptops and cameras for years. Li techno invaded ham radio stuff at least 5 years ago.
All of those packs have the protective over and discharge protection which has worked flawlessly for me, but as you probably remember, there have been major recalls on laptop lithiums due to fire and explosion with some of the earlier models.

Additionally, NiMh techno is advancing fast. The new low internal resistance packs are just about to hit the market, providing power density even closer to Li than NiCads. The EF guys are drooling.

If for no other reason than environmental concerns, Nickel Cadmium batteries are going to become history. Wisconsin DNR is getting nasty if they catch you throwing these into the general garbage heap.

I am actually quite elated that Todd "made the switch #2", cuz now he will have more time to help me make FT's trailer I just bought look like his own, which is kick-butt, while he is waiting for his Li's to charge. :>)

Most CVCC chargers are set to 4.2/8.4v for Li-ion cell(s). The cells come off the charger at 8.4v, but are rated at 3.7v/7.4/cell(s). I have never seen a 4.2v Li-Ion, but depending on chemistry, I have seen 3.0, 3.6, 3.7, and 3.8v cells.. As opposed to nicads and NiMh which lose that surface charge rapidly, Li's hold onto it for days, even weeks in my experience. The photo is of one of my 7.4/1550 packs that is fully charged and floating at 8.4v.

Tom