Thread: Problem Motor or battery??

I have a Minn Kota 55 lb thrust, a Walmart deep cycle 5 years old. Used battery 7 hrs on Gheenoe with 46lb thrust trolling motor, FF and sometimes aerator.
Yesterday on J16 Carolina skiff same battery with 55 motor only last 3 hours. After recent charge had battery tested and was told battery ok but needed charge.
Do I have a motor problem or a battery problem???