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+# Baofeng UV-5R Battery Case
+A simple battery case for the Baofeng UV-5R (and maybe some other Baofeng models) radio.
+
+It was inspired by commercial battery adapters, which can be bought online:
+
+<img src="pictures/Original.jpg" width="40%">
+(Source: https://i.ebayimg.com/images/g/b9gAAOSwS9BdGHeZ/s-l1600.jpg
+
+The 3D-model of the case can be downloaded from this Github repository. The original model was made by  jameslee522 (https://www.thingiverse.com/thing:4607617 / CC BY 4.0). I customized it using Tinkercad, where you can also find this model:  https://www.tinkercad.com/things/dRWLIG0PLxn
+
+<img src="pictures/3D-model.png" width="30%">
+
+## Original Battery Pack
+The nominal voltage is 7.4V (Li-ion cell)
+
+pinout: 
+<img src="pictures/Battery_Pack.jpg" width="30%">
+
+## Electronics
+I designed the case in a way, that it can be plugged into a USB-5V source like a powerbank. For this purpose it uses a step-up converter, which you can easily find online. There is also a capacitor to provide a stable voltage at current spikes (for example in the transmit mode).
+
+The battery connection poles can be created using some strip grid circuit board with some drops of solder on it (see pictures).
+
+You can also modify the design to work with a 12V power source (like a car socket) by using a step-down converter.
+
+The output voltage must be set to 7.4V!!
+
+<img src="pictures/Baofeng_Step_UP_Circuit_Steckplatine.png" width="100%">
+
+## Final design
+<img src="pictures/Case_Bottom.jpg" width="40%">
+<img src="pictures/Battery_Poles.jpg" width="40%">
+
+
+<br><br>
+<p xmlns:dct="http://purl.org/dc/terms/" xmlns:cc="http://creativecommons.org/ns#" class="license-text">This work by <span property="cc:attributionName">Dustin Brunner</span> is licensed under <a rel="license" href="https://creativecommons.org/licenses/by/4.0">CC BY 4.0<img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" /><img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" /></a></p>
+
+<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons Lizenzvertrag" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />Dieses Werk von <span xmlns:cc="http://creativecommons.org/ns#" property="cc:attributionName">Dustin Brunner</span> ist lizenziert unter einer <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Namensnennung 4.0 International Lizenz</a>.