Can I charge an AGM battery with a standard battery charger?

It depends on the battery charger you use.

AGM batteries have specific charging requirements and should be charged with a charger compatible with AGM technology.

Many modern smart battery chargers have a dedicated AGM programme.

A charger not suited to AGM may supply the wrong charging voltage or use an unsuitable charging method.

This may mean the battery is not fully charged or is exposed to harmful overcharging.

What should I check?

That the charger is intended for AGM batteries.
That the charger has the correct voltage, normally 12 V for passenger car batteries.
That the charging current is suitable for the battery’s capacity.
That the charging programme follows the battery manufacturer’s recommendations.

Can I use a charger without an AGM mode?

In some cases, if the charger’s specifications match the battery manufacturer’s charging requirements.

A dedicated AGM mode is therefore not always an absolute requirement, but the charger must be compatible.

If you are unsure, choose a modern smart charger that explicitly supports AGM.