How about the one? Good battery life and 8GB RAM. https://www.amazon.co.uk/Acer-Aspire-A515-51-50Y5-15-6-Inch-Notebook/dp/B078KG7B62/ref=sr_1_5?ie=UTF8&qid=1531685571&sr=8-5&keywords=Acer+aspire+5
Battery life is supposed to be awful but apart from this is it worth the money ?
I imagine they'll use the same basic motherboard for a variety of model ranges, so they solder 4GB in production then add more sticks if a specific model requires it, of which varies depending on what they can get cheapest at a given time.
£510 at laptops direct. https://www.laptopsdirect.co.uk/lenovo-v330-intel-core-i5-8250u-8gb-256gb-ssd-15.6-inch-windows-10-laptop-81ax00cbuk/version.asp?refsource=LDadwords&refsource=ldadwords&mkwid=sDbrZKM9b_dm&pcrid=184842784033&product=81AX00CBUK&pgrid=46259009011&ptaid=pla-479333348317&gclid=CjwKCAjw4avaBRBPEiwA_ZetYqaQPwE-Pk4P1o5VwA4XeD6egD_I8iUDHYfXp2YChbZEuqJMArlleRoClHEQAvD_BwE
2 cell battery will give you s*d all battery life. It is portable in name only IMPO. Lenovo is renowned in putting older non MIMO wireless chips in their laptops which can give you intermittent or slow connections if you have multiple devices connecting to your router.