I have a Napa marine battery that I use as my only source to power me and my Minn Kota 55 lb thrust via a 14' Jon boat.

Her`s what is going on ...The battery was a nice gift given to me in 2021 for Father`s Day. I`ve really liked it because it`s lighter than my previous one. This spring I notice an afternoon of fishing 3-4 hrs runs it down to like 70 on my charger. After about 3 hours on the charger it maxxes out at 80 every time. I take it off charge and several days later I`ll put it back on charge and it will hit 100 in 30 minutes.


Today, we fished 5 hours and went all over a local reservoir, battling wind as we trolled the entire time. Probably should mention I usually troll 100% of the time . Well, after today`s long day of trolling the trolling motor barely made it back to the ramp. It read 20 when I put it on the charger.

I know you aren`t supposed to run it down that low ever...

Is it likely the battery will return to a full charge?

Knowing that I primarily troll and the trolling motor is all I have to power the boat, would a more expensive AGM or Lithium battery serve me better? I had hoped the Napa Marine battery would have served me longer but I probably put 20-30 fishing trips on it.

Thanks!