One of the Sense battery pins is shorter than the other

[eidnoc]

There are four pins on the square battery that attaches to the back of the watch. One of them is shorter than the other. I have tried cleaning the back of the watch and the battery with alcohol, but it still does not work. I have only had the watch less than a month. It used to work fine, so perhaps the pin was knocked or hit in some way. 

Moderator Edit: Clarified subject

[Guy_]

This is a common problem.

You can get a replacement charger under warranty.

Probably best to contact Fitbit Support directly. They may be able to help you with that..

[eidnoc]

Thank you for your advice. Yes, they are sending me another charger.