My 2020 Grand Cherokee has an OEM AGM battery with an EXPLICIT warning that you can not exceed more than 14.4 volts for the absorption period

Always conditions and then charges my Optima yellow and red top and std batteries for Jeep, Autocross car and 2 trailers withing about 6 hours for a dead <8 volt battery

The attached pictures have data from two cheap 430 CCA 12-Volt flooded lead-acid batteriesQuestions

They share their charging profiles online with full transparency, and they do NOT exceed 14.4 volts, albeit at a slower rate of 1.25 amps