Raspberry PI Zero W mobile case w/battery

Raspi Zero W is a remarkable little machine. In order to make it more portable I added:
-3.7V 1500mAh LiPo w/protection (similar to this one http://www.ebay.de/itm/1x-Lipo-Akku-LxBxH-52-x-34-x-5-3-mm-3-7V-1000mAh-1S-JST-Stecker-523450-/351726193712)
-Charger circuit (http://www.ebay.de/itm/lipo-lion-Akku-Lademodul-mit-Schutz-TP4056-Arduino-Solar-charger-Raspberry-Pi/171853977388?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
-5V Stepup (http://www.ebay.de/itm/Pololu-5V-Step-Up-Sp