Yuasa car battery (Great Moor SK7)

Battery is starting to come to the end of its life, it will hold a 13v charge 100% for a while but it's state of health(SOH) is now below 50%. It doesn't mean it can't be used it just means that if you leave it for a long time it will lose it's charge, so if it's in constant use it should be ok for a while. Our cars get left for weeks so it's becoming unreliable for us and has been replaced.
Dimensions are: 195mm long, 170mm wide, 200mm high plus the posts which are 20mm.
# Please respond with when you can pick up from Hazel Grove and a contact number or you may not get a response. Thanks.