Asgard shared his BLiVIT project in the forum:
One of the things I have noticed missing, for a pretty long time, is a good *safe* lithium cell charger that also supplies a load with a good efficient regulator. My answer, I hope is the BLiVIT. This is a moderate-sized board that incorporates charging from either USB or a wall wart, efficiently manages a single Li+ or LiFePO4 cell, has a power-on/off soft switch (Just like my Powah-1), a fully isolated load supply (no need to blow up my scope when the wall wart is connected), and an efficient boost/buck regulator that supplies either 3.3V or 5V.