I am not sure what caps are used but any high voltage signal path application for caps generally requires high quality caps.
Most speakers use high quality polypropylene caps for the crossover ($5 to $10) as do Vandersteens (I think) - these do not need reforming like electrolytic caps (although like any cap they drift with use with most drift occuring in the first 100 hours). So I am not sure what the battery actually does unless? As for peformance - within a few minutes the capacitors within your speakers should perform optimally so I am not sure the advantage there either. (The rubber surround on the speaker drivers will also ease up after a few minutes each time you power up too and thermal heating of the voice coil will change the way the speaker behaves too - do you have a "block heater" on the driver motor assembly as we Canadians have on our cars? It would be a sensible addition if one is worried about capacitor warm up)
Most speakers use high quality polypropylene caps for the crossover ($5 to $10) as do Vandersteens (I think) - these do not need reforming like electrolytic caps (although like any cap they drift with use with most drift occuring in the first 100 hours). So I am not sure what the battery actually does unless? As for peformance - within a few minutes the capacitors within your speakers should perform optimally so I am not sure the advantage there either. (The rubber surround on the speaker drivers will also ease up after a few minutes each time you power up too and thermal heating of the voice coil will change the way the speaker behaves too - do you have a "block heater" on the driver motor assembly as we Canadians have on our cars? It would be a sensible addition if one is worried about capacitor warm up)