The ability to use a trolling motor battery in freezing temperatures depends heavily on the type of battery you’re using. Here’s a breakdown:

Lead-Acid Batteries:

• Susceptibility:
  • These batteries are highly susceptible to damage from freezing, especially when they are not fully charged.  
  • A discharged lead-acid battery can freeze, which can crack the casing and cause permanent damage.  
• Performance:
  • Cold temperatures significantly reduce the capacity and performance of lead-acid batteries.  

Lithium-Ion (LiFePO4) Batteries:

• Advantages:
  • LiFePO4 batteries generally perform much better in cold temperatures than lead-acid batteries.  
  • They retain a higher percentage of their capacity in cold weather. Trolling Motor Battery
• Charging Concerns:
  • A critical point is that charging LiFePO4 batteries below freezing can cause permanent damage.
  • Many LiFePO4 batteries have a Battery Management System (BMS) that prevents charging in freezing temperatures.  
  • Some LiFePO4 batteries are designed for cold weather charging, and contain internal heating elements.  
• Usage:
  • Using LiFePO4 batteries in freezing temperatures is generally acceptable, but charging them in those conditions requires caution.  

Key Considerations:

• Battery Type:
  • LiFePO4 batteries are the preferred choice for cold-weather applications.
• Charging:
  • Avoid charging LiFePO4 batteries below freezing unless they are specifically designed for it.
• BMS:
  • A good BMS is crucial for protecting LiFePO4 batteries.  
• Manufacturer’s Recommendations:
  • Always follow the manufacturer’s guidelines for your specific battery.

In summary:

• While you can often use a trolling motor battery, especially a LiFePO4 battery, in freezing temperatures, the key concern is charging.
• If you have a lead acid battery, keep it fully charged.
• If you have a LiFePO4 battery, be very careful about charging it in freezing temperatures.

I hope this helps.