Outdoor camera battery dies every 12-18 hours

I have a hardwired outdoor camera and have zero issues with it.  I recently installed a 2nd, this one battery only.  The battery dies after 12-18 hours although the app will show battery % at 100 up until I get a notification that the camera is shutting down due to critical battery.  I have the sensitivity set for the lowest setting, people only, zones, night vision off, etc.  Hardware issue? Software issue? Both?
The best part was the support offered by the chat agent that I spoke with yesterday.  The gentleman explained that it was a ME issue.  Apparently, SimpliSafe requires a charging block of 7.5w or better to properly charge the battery. I confirmed with the agent that I was using a 12w charging block (used 2 different blocks) and the battery itself is telling me that it is fully charged (full lights) after 5 or so hours of charging.  I was informed several times by the agent that 12 was less than 7.5 and thus I was causing the issue myself, SimpliSafe had no responsibility to assist in resolving.  A lack of basic training/education?  A lack of active listening?  A focus on explaining away product issues instead of actually troubleshooting and resolving customer concerns?
Time to start shopping for a customer focused alarm company.