I bought a genuine original equipment yuasa YTZ7S here: https://www.padgettsmotorcycles.com/product/genuine-yuasa-ytz12s-motorcycle-battery-copy/
I'd go yuasa or motobat. Saying that I have a 16 year old airo came with my dirt bike,that still works.
is it ABS? The baterry size is different to non ABS. Cheap one is fullbat. Expect a lifetime of 2 years unless it is always connected to a smart charger. For the price of yuasa ( I went throught 2; each lasting just over 2 years) you might want to look into LFP provided you are not running accessories that drain the battery
Thank you for your replies, I have bought several cheap batteries and an OptiMate Charger over the last few years, so now have had an OptiMate delivered and am looking forward to fitting it Happy Riding to you all