Cold temps shouldn't affect lithium batteries. At least in appliances such as flashlights. They will shine just as brightly but there's no degrading of performance....they then just go out.
Cold temps shouldn’t affect lithium batteries
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boy are you thinking inside the box!
How about running an electric heater to keep an uninsulated metal box(a car) heated to comfortable temps when zipping down a highway at 60MPH(windchill effect)? Ya think that might suck down a battery?
Figure on AT LEAST a 3000 watt heater plus a circulating fan. Now look up how many watts it takes to push a LEAF down the road at 60MPH and I think you will be amazed what a joke this idea is.
Not an expert in all battery types.
Most batteries at 35F will put out only about 65% of the power they will at 80F.
Which in an electric car means ~65 mile range instead of 100.
Assuming you don’t run the heater, which isn’t likely at 35F.
They are affected -- bigtime.
For example, LiFePO4 starting batteries are frequently installed into motorcycles as starting batteries when the original SLA gives out. They are great when warm -- often more cranking amps and are much lighter, of course. But when below freezing the diminished response of the battery plus the extra drag due to viscosity increase results in their not even being able to crank the engine at first. But with a few seconds of cranking load applied the battery heats up internally and then will turn over the motor. So it does generally succeed in the end. Some people actually turn on the headlight for a minute or two to pre-warm the battery.
They are affected -- bigtime.
For example, LiFePO4 starting batteries are frequently installed into motorcycles as starting batteries when the original SLA gives out. They are great when warm -- often more cranking amps and are much lighter, of course. But when below freezing the diminished response of the battery plus the extra drag due to viscosity increase results in their not even being able to crank the engine at first. But with a few seconds of cranking load applied the battery heats up internally and then will turn over the motor. So it does generally succeed in the end. Some people actually turn on the headlight for a minute or two to pre-warm the battery.