Wow cool prep for these AGM batteries, I’m only familiar with those Yuasa snowmobile and motorcycle batteries bit have never prepped one with dumping in the sulphuric acid.. so I need to ask a question on trickle charging batteries my 2013 A4 looks to still have the original battery in it, but it’s been sitting awhile because I have the front carrier completely off doing the complete timing components upgrade.. my crank/cam ECM correlation is -7.1° so I decided to do it all.. dude I have no idea how you do that job without removing the front??? Although it only took me a few hours to pull off carrier and I know how now.. anyway I wanted to start to charge my battery because I disconnected it because I pulled the air bag connectors.. so is that battery an AGM or a std lead acid battery and I have a charger that has a setting for AGM/lead acid but I’m not sure what the difference are other than current draw. Can you charge a non AGM battery in a AGM setting and vice versa? Dude wear gloves next time