What's up yall?

I am having issues with my batteries and charging system.

My issue is I have been through several sets of batteries. 1/2020 Replaced the factories, 1/2021 Replaced drivers side battery, 10/21 replaced drivers side.

All are Diehard AGM and replaced under warranty.

Now I am exhibiting the same symptoms of a dead battery.

Supposedly this battery tested good but holds 12-12.3 volts after driving, and in the morning, I am at 11.8 with a slow crank.

I live in GA, so it has not gotten cold yet.

Charging volts are 14.4 on average.

I either have something drawing power, or something is killing cells in the batteries.

I only have a RaceME Ultra for aftermarket electronics are concerned.

I have unplugged it overnight several times to see if this was the draw.

I removed the grid heater, so no amp draw at startup.

Has anyone run into this or have any idea where to start?