Bikelife ukkk

So aslong as the battery is 12v and fots in the box and it doesnt go on its side i just took it off for access it sits up straight i have a 12v 14.6ah battery so this would be ok in replacement for 12v 9ah and also lead acid is ok ? For it sitting up

Box that was added on from previous owner

Does the size of battery matter cos on my bike its been moved to the back under the tail light theyve installed a metal box which isnt the original but its quiet big so i think any should fit and i meant does the ah matter like if i get a 12v 14.6ah would it matter or does it need to be 9ah

Hi im trying to figure out about the battery i need i have a Pulse Adrenaline 125cc And The Battery Is 12v 9Mah Is it possible to you any other 12v batteries such as 12v 12mah or 12v 14.6mah or does it need to be exactly the same and does it matter if its gel or lead acid please help me as i need to get one asap