Over the weekend at the race I was putting my battery on charge between rounds. I thought i was done and they gave us a expedition pass if we wanted it. I didn't charge the battery and figured it would be fine. Engine ran perfect all weekend but on that last pass. It sounded like I was chopping the throttle but wasn't. Ran fine at 2500 RPM but would cut out if you gave it any throttle. Looked the boat over checking all the grounds and connections and everything looked fine. I put the battery on charge when I got home and got it to full charge. Fired the engine, warmed it up and held it at 5500 for a sec and nothing. Ran and sounded great !!! I'm running a mini 50 amp alternator, new Optima battery. All I have on my boat is a elec fuel pump, digital MSD 6 AL and bilge pump and a tach and 2 more gauges. Why wouldn't my alternator keep the battery charged?? Or might there be another problem when things get warmed up ??? And is it ok to put my charger on 10 amps to charge this AGM battery between rounds?? I just always charge them batterys at 2amps. I did check the volts with the boat running and it's 14 volts.