Where is the data sheet for the 3.7V, 2000mAh, 5C LiPo battery 
?
What is the operating temperature range for this?
Thanks
To confirm: https://www.robotshop.com/en/37v-2000mah-5c-lipo-battery.html
Don’t see a datasheet either, but it uses a standard LiPo cell, so without much additional information, you might assume 0-40 Celsius and “play it safe” within this range. They’re not meant for winter, nor high temperatures.