Well Red, with the gen 2 insight it cycles the dc to dc converter from the ima system off and on to charge the 12 volt system under regen and when the voltage falls below 12.5. Ive had some measurable improvement using an agm u1 battery. I added 2 to help firm up the audio system and it had a noticeable negative effect.
I see you can buy small lithium packs in the power sports section of walmart and advance auto and am thinking about giving that a try. Then of course relocating it to the rear by the ima system so it has a smaller window of operating temperature.
A bad 12 volt starter battery will still test good, but cause the gen2 to loose 10-15 mpg and see the ima system dip into regen and little assist.
