Hello from France,
during our last "Rally Game / GT South West Challenge", I'd test the Capacitor Pack from Castle Creation.
http://www.castlecreations.com/produ...-cap-pack.html
What I can say is that: there's no gain in mileage!!!
So???
The race was held in Pau, a little permament track designed for touring cars. A lot of small accelerations very hard for electronics especially for the batteries at the end of the heat!!!
And the batteries were cooler than the previous race with the same amount of enrergy in them.
For me, it's a good protection especially in GT or OnRoad class.
Au revoir.