I obviously need to be more specific with my question. According to the description here, the device is only for lithium batteries. However, the technical data agree with other suppliers as well as with the instructions for use, so that all common types would be chargeable (AGM .... etc.). If this is true, the next question is. Why is the price blatantly higher than with other suppliers (e.g. Swissbat24 - the link to this: https://swissbatt24.ch/ladegeraet-batterie-zubehoer/batterieladegeraet/alle-ladegeraete-batterie-zubehoer-anzeigen/1793/victron-blue-smart-ip65-12v-5a-batterieladegeraet-mit-bluetooth?c=298 By the way, the price development is unclear, it is in the diagram at about 96 or so, as announced by Google in the price comparison. And another link to a data sheet: https://swissbatt24.ch/media/pdf/f0/5f/64/Blue-Smart-IP65-Charger_2016_web_DE.pdf Now I would be grateful for clear(r) answers.