I have sent geekbuying an email and currently I am waiting for their answer.
I hope they find a solution. I hope they tell me to send it back at their own expense and send meĀ another one.
If they accept to send me a new one, I will ask them to check if it charges up to 100% and let me know how much time it stays on battery before they send it.
I will also try to contact jumper too. I have found their phone and I might call them with skype.