Hi Im new to this but I just got this boat for christmas the Atlantio 059 with two motors, and a 7.2 v 1800 MAH, and I want to upgrade the battery so it last longer than 15 to 20 min, Now I went and got same volt battery pack but 3800 MAH will this setup work or would it burn my motors, also Im installing a twin engine water cooling system before I try this new battery. Any idea what should i upgrade with the battery to make this little boat last longer and run a little faster. Thank you all.

Your 3800 packs will work great, and if you want more speed try different props.

by changing props do you mean getting bigger ones or sharpest ones or metals ones, and should i change the motors to like 400's or 500?

Metal props that are sharped and balanced. You dont have to change motors.

thank you very much.