Been back & forth with technical engineering at Trojan on the new Trillium batteries (made in USA) and also Pro Charging Systems (OEM for my PS4 Delta Volt charger) and am pretty comfortable that I can do a battery swap for my 3 group 31 Odyssey AGM trolling batteries to Group 24 Trillium's and as stated by Trojan, the existing charger will fully charge the lithiums. AGM for starting will stay as Mercury requires it for the new 250 ProXS V8.
Loose 2/3's the weight, smaller physical battery size, use existing charger, made in USA by reputable long time battery OEM, gain some useable amp hours, battery itself has built in BMS to prevent over charging, and 4 year warranty for trolling motor application. Awaiting feedback from engineering at Pro Charging Systems on testing of the PS4 AGM charging profile on the Trillium.
https://www.trojanbattery.com/trillium/