Capacitors... the key part here is "capacity". They can store small charges (depending on their size) that are usually not voltage specific, for small surges in power such as in small power supplies. They most likely will not have enough capcity for the purpose you are wanting to use them for. They absorb small spikes caused by electric motors or can keep current flowing when there is a momentary (read momentary) changes, increases, in load requirements. A capacitor large enough to help out would be pretty large in comparison to a battery pack.

Best bet.. higher capacity battery pack or a six volt pack.

Hey Gene.. glad to hear he's doing better. Nice gasser, indeed!!! I've not move up that far yet. Still at the 1.20 / 1.60 two stroke OS stage.

CGr.