Lipo temps??

[marcus]

Hi Guys
Question.
I'm building up a couple of projects using mounts/motors/ESC etc from Mike. Now, I'm very familiar with brushed and brushless electric setups but admit to being a bit of a newbie with LiPos.
What kind of temperature should be treated as a maximum for the LiPo's themselves during use?
I'm wary of them to say the least and take huge care when storing and charging them, but discharging in the car is a bit Gray for me right now.
Thanks
Marcus