BlueTooth audio receiver casing + battery powered

This is a very simple case + battery power for cheap BT receiver
I dont need the keys so they are not managed at all

The case is clipped + glued

It's better to remove the big USB A connector from both USB charging and BT module

Shopping list :
* BT module : https://www.ebay.fr/itm/Micro-USB-DC-5V-Audio-Receiver-Board-Amplifier-Bluetooth-TF-Card-Decode-Player/201585670858?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
* power bank module : https://www.ebay.fr/itm/5pcs-5V-Step-Up-Power-Module-Lithium-134N3P-Charger-DIY-For-USB-Display-LED/122805046458?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
* Switch : xx

Be careful with the "power bank" module
The circuit has very low consumption (~ 20 mA), some circuit will shutdown if the current consumed is too low