Harrison, I think that Heath is the one that is intimately aware of the batteries for these things, but I think that he is down getting hitched in Mexico. Shoot him a PM he'll be back before too long.
In the meantime:
AKG ck61/c460b's > Segue Dogstar XLR's >
m148 > Segue Dogstar Interconnects > Oade modSBM-1 > JB3