Dash Voltage reading vs Multimeter at Battery

[Andy29847]

Can both of these batteries effectively be charged together still hooked up ?
About 2+yrs ago I changed my Aux and I charged it overnight before installing.
Am I looking at a new battery already
Im with @Maximus Gladius ,I am starting to write the Eulogy for the Aux battery maybe move to a Genesis and run heavy cables up front and connect exactly how the Aux lawn and garden battery does.

Short answer - yes, the charging system is OK . I believe the majority of the problems with JL and JT Jeeps is caused by poor quality batteries. I also believe that there is no good reason to have 2 batteries, especially when you can get a premium H7/Group 94 battery that has power equal to both Mopar batteries (and also comes with a 4 year warranty).

https://www.jeepgladiatorforum.com/...ery-with-a-premium-h7-group-94-battery.76866/

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[ShadowsPapa]

I need to find the pics and references to the oscilloscope tests run on one of these systems with the dual batteries. Enlightening.