It's completely shocking and disheartening seeing so many similar complaints--I also have the same issue--barely used in two years, in mint condition, always kept in case--and one day, the battery fails, and the device will not turn on.
As a "premium product" selling at a premium price point, GoPro owes it to its customers to be accountable for faulty devices that seem to be so prevalent. Recall them. Offer a free exchange. Offer for a significant credit for an upgrade.
You cannot simultaneously claim to be the best, while selling a product that doesn't work--that's just getting the basics. I personally find this embarassing for the brand; this technical issue a betrayal to your customers trust, and will cripple their willingess to ever buy your brand again--nevermind recommend you to a friend.
It speaks volumes about what is going wrong with the GoPro business. I hope you'll find the integrity to fix this issue and make things right for your customers. What a way to turn brand promoters into detractors who will tell anyone listening how terrible your products (and support services) are....
I
