UPDATE:

I'm a 250 pound guy. My boat is a 9 foot Outcast pontoon. 45 lb thrust edura max Minn Kota. I ran my 54 AH Dakota lithium Ion today for 4 hours straight, 2 of them were at 50% power,and the rest was at full bore. When I checked the battery meter on the Minn Kota it read full bars. So my buddy and I put his volt meter on the battery to check,and it read 12.9 volts. I was blown away. The performance on my pontoon is ten fold with the reduced weight,and it blew pretty good today,about 10 kts. I'm impressed to say the least.

Robert