GordonTurner wrote:1. They make these chemical "glove warmers", I think they're reuseable (?), put a pocket on the front of the battery compartment, slip an activated glove warmer in there before you start preflight, remove it when you're ready for start, and (hopefully) voila.
2. Install a very small electric warmer (there must be something out there), and perhaps a second small battery (EFIS backup?) to warm up the starting battery before start.
Some additional complication, but you get the significant weight savings even so.
Operating Environment: -18°C (0°F) to 60°C (140°F)
Q: If I use my powersports vehicle in cold weather which battery should I use?
If you regularly operate your powersports vehicle in weather below 32 degrees Fahrenheit (0°C) then we recommend you use the next size battery up from what is recommended in the application chart. All batteries start to lose performance below 32°F (0°C), and LiFePO4 batteries tend to fall off more dramatically. When the temperature of the EVO2 goes below 32°F (0°C) internal resistance starts to build in the battery and the amount of available amperage goes down as well. This should lower the Cold Cranking Amps, correct?
A: No. LiFePO4 batteries have the ability to build their own internal heat energy when a draw is put on the battery. This means that although if may be 0°F (-18°C) outside, the battery has the ability to raise its internal temperature to 58°F (14°C) in seconds with a 100amp draw. As the temperature rises inside the battery, internal resistance lowers and the battery performs just like it does when it is 60°F (15°C) outside. This means that the amount of available amperage does not change based on temperature. Check out our video of Cold Starting Characteristics of LiFePO4 Batteries.
If you operate your vehicle in temps lower than 32deg;F (0deg;C) we do not recommend our batteries. You would best served with a traditional deep cycle lead-acid battery.
fastj22 wrote:One would think that with such an advanced battery, it would have internal circuitry to protect itself from a deep discharge.
rizzz wrote:fastj22 wrote:One would think that with such an advanced battery, it would have internal circuitry to protect itself from a deep discharge.
Yes, I agree.
Modern phone batteries have such a mechanism built in, why not these?
Other than that I like the battery so far, I’ll just have to make sure I never forget to turn of the master.
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