I might as well jump in here and give the MK 30 a plug too.I have ran one for I do not know how many years now,I want to say 8.It runs all day and then some on one charge.I purposelly ran it dead and got a day and three quarters out of it.[I run a very big innerstate]It has dealt with the salt as well as the fresh.It pushes my fully loaded 12' hilaker around fast enough to not have to fire off the 18hp on the lakes.I will never fish anything but on that boat.My goal this year is to incorperate into the main steering system for salt trolling.