AGM 12V battery Auris II necessary?

Hi, is there someone who has a normal 12V battery installed in the Auris II (with me Bj 2014)? Apparently the right battery is an AGM model with 38Ah. Model S34B20L-A. ATU can not get a suitable one. Toyota dealer calls over 300 EUR only for the battery. Order on ebay and install yourself is too risky for me. What are the theoretical or real experienced problems with a normal average battery without AGM? Should I risk it? Have nothing current or an E Find a report, maybe in other forums?