CTEK MXS 5.0 charging options - Engine, Transmission, Exhaust etc - MX-5 Owners Club Forum

I’ve just bought a CTEK MXS 5.0 battery charger. Not being au fait with battery jargon I’m confused as to which charging option to set with the MODE button, the alternatives are AGM or RECOND. The car is on its original battery and being a 2019 1.5 Sport Nav hasn’t got the i-ELOOP system. Any guidance / advice appreciated…

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