I have the older Ultra DuoPlus II and the new Ultra Duo Plus 30 that I picked up at Superman.

The older units are not for lithiums. The Schultze and the Duo Plus 30 share similar software and both do lithiums. The second charge port on the Schultze is still limited to 330ma and 5 cells rather than 4 on the older UltraDuo II, but on the Plus 30, they have boosted that up to 500ma and 5 cells. I use that to charge my rx battery between flights.

On the 30, I have to set the type of Lithium battery, and then select the capacity and number of the cells. The software then selects the proper constant voltage, constant current charge.

I don't use lithiums in my planes, but do use them in my cameras and amateur radio hand-held transceivers. The Plus 30 works great and charges faster than the chargers that come with the units.

Got to be careful with lithiums---overcharge and they can explode, and discharge too deep, and they're ruined.
I see where some of the new packs advertised on the RCU banners have protective units built right into the packs, but then I think you are stuck using their charger, but I am not absolutely sure about that.

I see where the street price of the Schultze is about 159.95, whereas the DuoPlus 30 cost me 220.00, but I did not really shop around, since very few are available. I got mine from Camillo at Graupner down in Florida.


Tom