Walkie talkie +10km

Hi, I created this model in order to make the forclaz wt900 walkies more capable. Originally they use 3 triple-A batteries, with only a few hours of duration. With this mod I added 2x21700 samsung 50e batteries in parallel, capable of powering the walkie for several days without charging. I used the radio-frequency module from the forclaz, and added a usb C charging port to charge directly the batteries.

the space on the back is to put a magnet, so that it can hold to metal surfaces.

The last version (v25) its the blue one from the photos, printed with TPU, so that it can withstand falls. some other minor changes were made.
If someone wants to know more about the project feel free to ask me trough my mail or my instagram: 
guillempdg@gmail.com
@guillem.miralles