I realize this is not specifically for electric cars but it deals with car batteries. I have researched extensively into this but I keep getting mixed information telling me contradictory facts. My confusion is what type of lead acid batteries are there? As far I know there are 3: - Flooded wet cell batteries - Gel cell batteries - AGM batteries However I have seen batteries labeled only as VRLA (valve regulated lead acid) and is therefore a "sealed" battery. I know that AGMs are also VRLA but can VRLA be neither gel or AGM? What type of chemistry would they use if this is the case? Thank you very much for any responses.