[ainarssems]

To know for sure what kind of battery you have you will need to look at the actual battery. Sealed could refer to either maintenance free battery which still has went holes and would leak when turned upside down or it could refer to fully sealed battery that would be just fine if you landed on roof or on the side like Optima or many AGM batteries. The setting on charger probably refers to fully sealed batteries that would not leak upside down but they would need slower lower voltage charging to prevent pressure buildup but many of AGM batteries can still take a lot of current because the surface area of plates is a lot larger and the final charging voltage need to be higher. Many chargers will have AGM setting as well. You will most likely have maintenance free but not fully sealed battery so which would require standard setting.