"Eric Greenwell" wrote
This corresponds with the Powersonic chart, so at -10C (15F), you have a 30%
loss of capacity. For winter flying, and spring or fall flying in places where
you can climb to, say, 10,000' agl, it's an important factor. Especially so,
when you know your encoder will likely be using it's heater, adding 50-150
milliamps to your current drain.

Put a insulated cover around the battery, and the heat of discharge will keep
it warm and the capacity up, unless it is seriously freakin' cold.
--
Jim in NC