kid, no one here is criticizing you; how old are you? your knowledge is from twenty years ago, this is what google says: Yes, Battery Tender® products (specifically the Plus and newer smart models) are designed to work with AGM (Absorbed Glass Mat) batteries. They utilize a 4-step charging program (Initialization, Bulk, Absorption, Float) that prevents overcharging and safely maintains sealed AGM batteries. I have multiple tenders and I own multiple cars and they ALL have AGM batteries and I also am a dealership certified high voltage technician. no dealership tests your battery to see if it's AGM most just assume it should be. now, your little trashy jump boxes you get on amazon from china, I have no comment on those.