(DO NOT CHARGE YOUR PHONE WITH THIS)

this is a work in progress fully editable as is fusion 360 project

anyways this is a 9 volt battery combiner that combines 4 batteries into 1
you can print this and use it the way it is at the current state of being just 2 copper terminals sticking out... i do not know why you would but it is meant to be connected to a second module with a buck converter (work in progress) and these batteries would be as a disposable source or interchangeable emergency batteries for my Sci-Fi charging station (also work in progress)

(DO NOT CHARGE YOUR PHONE WITH THIS)

unless you want a new phone go ahead, this needs a 5 volt regulator to be able to safely charge your phone

connected in series sequence which provides 4 times the voltage at the same current of a single battery and at the same capacity of a single battery this is meant for a future project connected to a 5 volt buck converter for now do not even try to connect your phone unless you want 36 volts rushing into your 5 volt phone... yes it will fry it

this is also meant to be connected without any wires, i am working on a terminal connection method through copper strips that's why you will find on the terminal plate channels to connect the terminals at this moment the channels are at 1.124 mm width to be used with 18 gauge wires but in the future they will be 3 mm so ignore the note on the terminal plate that says 3 mm x 1 mm strips also ignore the note that says 6 mm springs

once again do not charge your phone with this i know you want to but trust me do not

actually do not connect this to any electrical devices

now the things you will need to build this

for printing settings do not ask me i am no expert i order my prints i do not own a printer

you will need :

17 - 1mm screws (length vary to each plate but test and see i made the holes much deeper than needed just in case but use thread inserts)

17 - knurled thread inserts

18 gauge standard insulated copper wire (break your mouse like i did for wires)

2 - 12 mm x 3mm in diameter copper rods for upper terminals

2 - 4 mm x 3mm in diameter copper rods for the lower terminals

8 - 6 mm x 3mm in diameter copper rods for the battery terminals
(6 mm according to my calculator and the battery i have, test and see if you get a good connection while everything is screwed together)

4 - 10mm x 10mm battery holder springs (amazon sells them for cheap)

notes :

after assembly i did not add any indicators to which side to insert each battery i forgot and i am too lazy to do so check the terminals on the terminal plate before adding batteries or just mark them with a sharpie ( i will do it on the next version )

terminal holes are also at 3mm and the rods are 3mm yes there isn't a gap in between i know but they are meant to never move so i imagined this in my head i will simply attach each rod onto a drill and sand it ever so slightly to make it a perfect fit with a light coat of superglue, remember these are battery terminals and they will be under constant pressure from the upper plate and the springs pushing the batteries upwards so any movement might cause a shear point since it is copper on plastic on a 3 mm diameter area and the thickness of the plates are small, either that or i will heat them up a bit and insert the rods

the holes for screws are at 1 mm so when you use the inserts keep in mind the thickness of the walls is at 3 mm - 5 mm

do not forget to solder the wires to each rod since i did not come up with a way to connect wires to the rods

i left a 1 mm gap between the case and the plates to make it easier to pull out the uhh thing and change the batteries but you can change that in fusion 360 i included an F3D file so you can change whatever you want

the text size for the notes is at 0.5 mm so i imagine it will be bad to print those if you wanna remove those as well before printing do so, i know the guy who prints for me prefers to remove any text below 1.5 mm

i included file types in MTL, OBJ, STL and F3D just in case

this is a work in progress project meant to be used by me but like i said in my earlier projects whatever i do is going to be uploaded here so you might find a lot of weird things here in the future that might not even print or work and am pretty sure nobody is going to print my stuff anyways :)

did i say that you should not charge your phone with this?
DO NOT CHARGE YOUR PHONE WITH THIS

if you do manage to print it just for the sake of it please tell me and comment below i really like to see how it comes out for other people and how they did it, basically feedback yes... that.

have fun.