The most common issue by far with these fitbits is the issue with the charger pins, luckily it requires only a new cord. But for the people like me that cannot find a new charger in town (Seattle) and need my watch ASAP for making contactless payments, all we need to know is which connectors on the back are positive and negative so we can run wires straight to them. I have looked absolutely everywhere and seen a lot of other people with the same question and can't find the answer absolutely anywhere. You would be a lifesaver to many many Fitbit users, thanks in advance.