Underside
Here’s the underside of the Throwie showing a couple of rare earth magnets glued into some Sugru.
Sadly I think I was a little enthusiastic pushing everything together in the case and I damaged the LiPo battery, which swelled up and wouldn’t hold a charge. I swapped it out for a larger one I had and put them in heatshrink.
The new units I ordered behave slightly different from my first one and I’ll have to modify the code anyway.