How cold is too cold for lipo?

[VintageMA]

Check out the ThunderPower Lipo Sheet here:

http://thunderpowerrc.com/PDF/THPSafetyWarnings.pdf

Middle of Page 2:

Storage & Transportation
1) Store batteries at room temperature between 40 and 7 0 degrees F for best results.
2) If storing longer than one week; batteries must be stored at 3.8V/cell to 3.9V/cell (approximately 50% charged) . This is easily
accomplished using the Thunder Power 1010C charger.
3) Do not expose battery packs to direct sunlight (heat) for extended periods.
4) When transporting or temporarily storing in a vehicle, temperature range s should be greater than 20 degrees F but no more than
150 degrees F.
5) Storing Lipo batteries at temperatures greater than 170 degrees F for extended periods of time (more than 2 hours) may cause
damage to battery and possible fire.