Sounds to me like tthe charger or battery is defective; maybe a disconnected cell in the battery. If you registered for Atomik/Venom's Warranty, you should get a free replacement if you send it in. If you can prove to them that the battery isn't working via video, they will send you a new one, no questions asked. Provided if it is under 12 months old. Here is an instructional video on how to do the process IF the battery is defective. Click on one of the boxes at the end of the video for more instructions. I suggest the Express option.

https://www.youtube.com/watch?v=CopCF1WMS9M