Here's "little" something I made, using information on the mintyboost 3.0 page, I wanted to make it myself and as an amateur I dont yet have stuff to make-bake-chemicals-magic PCB's so I bought one pre-made "lanes" off the shelf PCB and cut/saw/reroute necessary paths
As It's not mintyboost, I call it xmAAAboost, took some searching and I was lucky to find so suitable mint box
Added on/off switch and an indicator led to see if circuit is powered or not, it's wired pass 5k resistor so it draws really nothing. I'm not sure what's it idle power usage of the schematic/caps etc so i felt like complete cutoff button would be nice.
It's nice and small, just a little longer edge than the AAA batt as you can see, ~5x5x1.5cm.
Here are two pictures and youtube video of the making process Youtube video, making of xmAAAboost.
hope you like it