Just to counter that - the Noco type equipment is a once only purchase that can be carried and used wherever/whenever needed, mine was about £80 and used several times on the many occasional road going toys I've accumulated, as well as the inevitable SOS power source for fading mobile phones whilst sat in traffic.
Ours has a Halfords three year warranty battery, it was on it when we bought the bus 12 years ago and is still working ok
why change summat that works! Our old battery was on the bus when he came from the states, late 2023 saw its demise. I think it was about 18 years old!
