Vape, Vaping Battery Safety should always be followed.
 

Check out this article from: Vaping360.com
http://vaping360.com/vaping-battery-safety-part-1/

Running my RC Drift car on carpet at a car show this last month made me realize how hot the batteries, ESC (speed controllers) & motor gets in hot temperatures.
I was only able to drift for 10 minutes.. I had to pit my car, pull the body off and let the car cool under an umbrella. Seriously.. Lipos can explode and safety should always be your number one concern.
Learn how to understand Ohms and watts...If you're a mod user seek advice from a vaper who's been vaping for a while and successfully charging batteries. It was not until I really understood my RC drift motor and how different a 3200 Lipo battery discharges for motor performance verses my 5000 Lipo. Once I installed the 5000 LiPo my motor WOKE UP! due to it is liking ( lack for a better term) the battery discharge rate. It was like night and day..

Check out this article for RC car batteries..even though it's not generally related to vaping you will get something out of it.

A Guide to Understadning LiPo Batteries

enjoy!