I am thinking about a 120 ah drop in lithium from KS energy. I know there have been several threads about lithium but I was wondering if what is claimed is true that these batteries can simply be dropped in to replace lead acid with no other modifications like uprated fuses, B to B etc. I have an Autosleeper Warwick XL which has the Sergeant EC400 system. I would love to hear from anyone who has just simply dropped on in and without modifying anything. It seems the factory fitted battery charger's profile will be fine for the lithium so I am hopeful. It's not that I do not believe what KS Energy claim but Hearing form someone who has actually dome the deed, at out were would boost my confidence.