Step 1

Follow this wiring guide to put those electrical components together. Measurements are not absolute, so you can make them a bit longer. I prefer to make all of those under 50mm to 40mm, and they fit. For the connectors to battery and fan, I use JST XH and PH, depending on which one the battery is shipped with and how you like them to arrange, so that you won't accidentally connect the wrong jack.

Step 2

Assemble and solder the fan cable. Make sure the sleeved part is around 12cm.

Step 3

Assemble and solder electrical unit.

Step 4

Cut and attach an adhesive foam strip to the filter box top component.

Step 5

Same to the fan.

Step 6

On the other side of the fan.

Step 7

Then you push the fan gently through the two posts. Please make sure those foam strips are not tangled to the walls of the filter box top component.

Step 8

Now rest the sleeved cable other the hole and then place the TPU plug over it.

Step 9

Close the filter box and put 8mm flathead M3 screws on.

Step 10

Attach the adhesive foam tapes around the filter space. Only 3 sides will be sufficient.

Step 11

Now put the filter in the filter cover on.

Step 12

Secure the rotating arms with two 5mm flathead M3 screws.

Step 13

Rest the other end of the sleeved cable over the hole of the electrical component, and then place the second TPU plug over it.

Step 14

Now this is the most difficult part: slide the electrical unit through the rails and carefully push it down, while making sure the USB-C connector is going through the hole and both MT3608 and TP4056 are properly in their respective slots. And then connect the fan to the electrical unit.

Step 15

Make sure the USB port is in the slot

Step 16

Put a velcro tape over the battery like the picture.

Step 17

Put the battery in and connect it to the electrical unit.

Step 18

Now close the battery unit and secure it with four 5mm flathead M3 screws. We're almost done!

Step 19

Push the rotating arms into the position (it can be hard, so use a little more force), and then use a 6mm caphead M3 screw on one side.

Step 20

Use a M3 knurled screw on the other side.

Step 21

The final touch: push the USB protecting strip in place. You can use any filing stick with a sharp end to help you finish this step. Please don't get too frustrated; I made it super tight so that water won't get into the electrical unit easily.

List of hardware and electrical components

1. MT3608 (the one with a micro USB)
2. TP4056 (USB-C)
3. LED (5V)
4. 1P2T switch
5. tactile switch
6. 1s - 8s battery status indicator
7. M3 4mm deep heat insert x 10
8. 5mm flathead M3 screw x 6
9. 8mm flathead M3 screw x 2
10. 6mm caphead M3 screw x 1
11. knurled M3 screw x 1
12. 6015 blower fan
13. JST XH connector
14. JST PH connector
15. DC 3.7V 5000mAh 955565 li-ion Lithium Ion Polymer Battery
16. velcro tape
17. 1/4" x 1/8" Foam stips
18. PUREBURG AM99 Replacement True HEPA Filter