SmartThings Multipurpose Sensor (2015 & 2016) case with AAA batteries
Description
After designing [thing:3212345](http://www.thingiverse.com/thing:3212345) and successfully having all my SmartThings motion sensors operating with AAA batteries, it only made sense to do the same with the SmartThings multipurpose sensors, of which I have a larger number. Although these sensors have a significantly better battery life than the movement detection counterparts, it still sucks to have to buy CR2450 cells and replace them every 6-8 months (in my experience, at least). So, this is a 3D printed housing for the SmartThings Multipurpose Sensor 2015 and 2016 models, which takes 2 AAA batteries instead of the single CR2450 button cell battery of the original housing. The 2 AAA batteries combined should provide a significantly increased energy capacity of over 2000 mAh, compared to the ~600 mAh of the button cells, and for only a fraction of the price. Unlike with [thing:3212345](http://www.thingiverse.com/thing:3212345), in this case it wasn't possible to reuse the original base part with the 3D printed case, so you'll need to print at least 2 pieces, the case itself and a lid. Optionally you may want to print also the base piece to fix the sensor to the door/wall, though the grip on the case is not great and so I myself ended up just using self-adhesive velcro tape to do the same function.
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