Now I am hoping things are roughly the same for everyone but this is where I found the stuff for the battery charger. Being at the starting pod, head south roughly 450 meter or so, and down at the bottom there will be debris and a large wreck (you have to go inside the wreck, from the top), that's where I found everything for the battery charger the other day. Fair warning though, it's not shallow waters and I had to go up to the surface several times while scanning everything in the wreck and surrounding areas. Hopefully you already have the seaglide, which helped getting up to the surface quickly !
Edit: I come to remember that there is a smaller debris site roughly 150 meter before and a bit to the right that might have the pieces as well, can check later once I'm home from work tonight unless you found it by then.