I have some old ego batteries that I gave to my friend who is new to vaping and a couple days after I gave them to him he gave me his problem. The charger was not turning red when he plugged in the battery and now whenever he tries to vape the button just flashes 15 times. I would like to know whether it is a fix or if I should scrap the battery use the connector for other projects I am working on. If anyone knows of a solution that would be great but if not then I guess my friend will have to wait to vape until his new battery arrives.