Look guys. Buy a Halfords battery. Purchase online and get it half price. They are good quality.
Any problems, they swap in store. Most places are a pain. Some even send back to manufacturer
Halfords workers go care. They connect it to tester, if it fails they swap instantly.
Just walk in the shop with it. Say its off your caravan.
I studied this in depth after buying 2 Varta van batteries online, 1 being knackered. Got an auto electrician to write a letter saying its duff. That was no good.
Ended up getting a free battery test from Halfords. That they accepted.
Halfords just swap, no messing. So just before 2 year warranty is up, kill it and get a new one for free