If a Bat test good on a load test can it still have a bad cell. The reason I ask is my PD55 looses power after about 3 to 4 hrs. Before it would run 5 to 6, but I had an extra 200# in the boat. I never used the Bat guage on the motor til today. The Fluke meter showed 13.07 volts. I checked the guage and it said 3/4 charge. Any suggestions? Oh the 13.07 was after the load test for 10 sec.