VXOC Astra-J/GTC

My battery is showing signs of needing a change as it is original Vauxhall AGM on my 62plate 1.7 Astra J GTC

My question is the replacement AGM batteries are quite expensive , can I go to regular flooded or will that cause me issues?

Thanks.

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I got a replacement stop/start battery fitted from halfords for £152 recently with a 5 year warrantee (over £400 from eurocar parts!!) for my Cascada 2.0 CDTI. I'm glad they fitted it as ECU's and brackets had to be moved to get to the battery holding clamp!