I am totaly pi**ed with the Aristo Li-ion batteries and am not going to buy any more. I have one 14.4 volt Li-ion battery I got from Batteryspace.com to use in an Airwire install. Now I am using the new QSI decoders and receiver. I was thinking of using 2 of the 14.4 volt LI-ion batteries in a battery car for a total of 28.8 volts and then setting the appropriate CV in the decoder for a max voltage of 24 volts. What does anyone out there think?