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Is it ok to use a 10/2 amp lead acid type battery charger on an AGM battery? Battery would be out of the car and likely just need to be topped-up.
That charger's fine for an occasional top-up on an AGM. But for longer-term or maintenance charging, higher voltage is required during the absorption phase, usually about 14.7 V. Otherwise the battery life is shortened.
The manufacturer will have the exact details for your battery.