ORIGINAL: BarracudaHockey
No regulators, fast charging, no self discharge. Really no downside.
I get mine from
www.wrongwayrc.com
Also, if you have one of the older DA ignitions I wouldn't run it on 5 cells, and if you go A123 get a voltage drop down diode. Their newer ignitions will run on higher voltage.
+2 since I'm not sure if "sorta" counts.... lol
Andy is right on target and the DA ignition module will have to be pretty old to not take A123 voltages, DA can tell you which serial numbers are affected if the OP is worried.
The other thing for the OP is that you've inadvertenly stumbled into probabaly the best (IMHO) solution available despite your reservations and while I like Fromeco most of my stuff does come from WrongWay RC these days....