Latitude 5510 - Orange light continuously blinking

Heya folks,

I've got a battery that is literally 1 year old (replaced by Dell under the extended battery warranty - If Dell are here - Case : <To protect you, your private information was removed from public view. All private data was saved to your private Case. DELL-Admin> ) 

I'm now getting a continuous blinking orange light. 

This happens when the battery hits 100% whether using USB C or Barrel type charger. 

And now when I unplug the charger, the laptop goes off. 

BIOS indicates excellent health of the battery. 

Diagnostics - No issues with battery or charger. 

Do I have a battery that's detonated after literally one year? 

BIOS is version 1.40.1 - reflashed and no change.