Good Day All
Yes, the battery is a lead acid type, lying on its side in the bottom of the hull (one weighs in at 600 grams, had two, now got a spare). I haven't had much to do with battery packs, never tried them, how much lighter are they and will they give me the same running time as a lead acid type (the motors are Graupner Speed 500E running at 6 volts).
Colin, luckily the Bathurst Corvettes haven't got much on the upper decks (a bit like the Bangor Class Minesweepers), so most of the weight is within the hull, its the deck and super structure weights that i need to keep light (I can't lighten up the hull or running gear, with maybe the exception of the battery), to keep the boat at the right waterline.
Richard