Auxiliary Battery alarm 2 weeks after battery replaced??




Starting to regret buying this thing!!
I replaced the Aux Battery 2 weeks ago after the original failed, we put the original on a charger and got nothing out of it, I paid for a Benz approved battery supplier brand that was $209.00!!!
Cars been fine since, now today I'm getting this error again and certain functions no longer work.
Has anyone else experienced this before?
Cheers.




Here it is before and after being load tested...








