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>>194
>raspberry pi
Are you seeing the size of this thing?
Pic related: fisheye 3.0 and my index finger.
These things come in a metal case that they slide up and down in: up deploys the hotplate and triggers heating, down deploys a USB connector for charging.
There are two screws to remove first, to free the internal plastic casing, but to get the metal exterior off I put it in a vise and deform it until I can slide out all the internal parts.
Since the first fisheye, I have made two improvements: first, keeping the USB port's housing attached (need to use a dremel saw bit to cut off just the plastic bits that aren't needed and keep the bits that secure it), and second supporting the "switch" with some material to ensure it doesn't get bent or clamped down (it's just a filament of copper that makes contact with another on the PCB).
I use a heat gun for make a precise shrink-wrap, but it's still hit-or-miss: one has to be careful not to strain the battery connections or pin down the switch while also doing one's best to seal the USB port and get it as tight as possible behind the hotplate and everywhere else.
The hotplate itself has a PTFE protector that needs to be epoxied along its outer edge since it isn't held in place without the casing, and there's a really freaking bright LED at the tip which I've painted over with black nail polish (still partially visible when heating or charging).
Granted, I've been tearing apart and putting together electronics since I was in elementary school, there's nothing to be afraid of if you don't do anything overtly stupid. Like don't try to pry things open with sharp blades or pokers, that's how you puncture a lithium-ion battery, not to mention permanently break stuff, and always try to get some appreciation for how a thing was most likely put together before you take it apart. Fisheye 1.0 sat in a draw for a year before I finally figured out how the metal casing was attached: it probably starts out as a cylinder, then gets formed right on top of the internals.