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Lithium batteries and max speed on your trolling motor

10K views 27 replies 12 participants last post by  SkiffaDee DooDah  
#1 ·
Found this little nugget on Minn Kota's website:
  • Power Output
    Lithium Batteries maintain higher voltages for longer. Motors engineered to make the most of flooded lead acid batteries can be damaged by the higher power output. To prevent this damage when using Lithium batteries you should not run your motor at its highest speeds, staying at 85%/Speed 8.5 or lower.

Anyone experience any issues with their trolling motor and lithium batteries at full speed?
 
Discussion starter · #9 ·
That would be a great question for PP. I'm considering swapping out my 2-12V ODP-AMG31M-925 batteries (70+ lbs each) with an Epoch 24V 100Ah Marine Battery - Lithium Trolling Motor Battery. The specs state:

Voltage: 24V
Max Charge Voltage: 29.2V
Operating Voltage Range: 20 - 29.2V

I can see that if the operating range is up to 29v how that could damage the motor running at full speed over time.
 
Discussion starter · #11 ·
You pick up on a great point and one I'm struggling with, 50AH vs 100AH. For many reason I like the idea of going with the 50AH. However I do not have onboard charging. So this is what I do worry about. There is also a nice cost savings with a 50AH over 100AH.
 
Discussion starter · #24 ·
@WranglerJoe and @Goose hope you don't mind me asking the same question to both of you. @Goose you have a 50AH and @WranglerJoe you have a 100AH if I read your posts correctly. Both of you have an onboard DC charger. So that can skew the results of my question but if you're fishing all day on the trolling motor what is the % of charge left in the batteries for a typical day?