According to Spectrum Labs, the QF has a shelf life of 18-24 months. Look on the enclosed instructions sheet for the batch code. The code denotes the batch date of manufacture. The shelf life begins on the date of manufacture.

Example: F9C-07 (Sept '07)
Burnt Toast Reviewed by Burnt Toast on . Quick fix and body temp Ok- so I had one other question- (sorry )- I know that QF 4.0 comes with the little heater but I live in south florida and I'm afraid it's just not needed but- my question is approx how long do I have if I just get it at temp and then keep it close to my...body (I'm a girl):jointsmile:...Would the temp continue to rise or remain level for several hours. The reason I ask is because the drive there is somewhere under half and hour and then they make you wait once they take ur id and you cannot Rating: 5