This may read out as stupid but if you have a brushed motor with limits at 12 v on a lipo battery. The lvc at 3.5 on 3S which gives you 10.5 and lipo will be 12v, how much time can boat be run before you can safely bring it in? Lipos are fairly new, thanks for your time in answering! Boat is a 27" roundnose, made from a kit I put together ( bought ).