Went out today. I'll post a thread about our success later. However, boat started a little rough. After a nice run, and then chumming for a bit, could barely start the boat. Luckily, finally got it going and went near the marina and bowfished. Running all out, it stuttered a couple times, but kept going. When we were done, it worked perfectly at the marina. We know the batteries are at least 3 years old, if not older. How many years do you generally go before buying new batteries? I know there are variable as to whether stored on water, how often it's used etc, but just looking for general recommendations on replacement times. Thanks, Mark.