Originally Posted by
Bksmithca
The external battery allows users to recharge the internal battery on cell phones, handheld GPS units. All of these things can be used off the airplane where there is no plug-ins available
Exactly. I have a small 5000mAh external Lithium battery that I use to recharge or supplement my Smartphone's battery when I'm traveling. Apparently someone left a bad or defective battery inside a seatpocket.