Lithium batteries are not very well suited for cold temperatures.
The batteries referenced are rated for Operating Temperatures of: -22°F to +140°F, (-30°C to +60°C)
Do you think a Super Powergate 40S Backup Power Switching and Charging System would be ok to always leave on? I was going to get this charging system so I didn't loose power during operation, and recharging.
I use the West Mountain Radio PowerGate solution with a Lead-Acid Gel Cell.PowerGate is optimized for use with GELLED & AGM type batteries,
but will keep flooded lead acid and marine type batteries near full charge as well.
You should call West Mountain about proper usage (charging) of those Lithium cells with the PowerGate.
The StarkPower “UltraEnergy” Models have a Battery Management System (BMS).
BMS monitors the key operational parameters during charging and discharging such as voltages, currents and internal temperatures.
For a RAW lithium metal battery, not best solution (PowerGate is NOT a SmartCharger) unless battery pack has its own battery management solution (BMS).http://www.westmountainradio.com/product_info.php?products_id=pg40s