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 # PiSugar
 ![PiSugar Logo](https://raw.githubusercontent.com/JdaieLin/PiSugar/master/logo.jpg)
 
-PiSugar is a battery module for Raspberry Pi Zero / Zero W. It's portable, light and very easy to install.
+## Why We Make PiSugar
+
+In the last few months, we have been working on projects base on Pi zero. It always comes to my mind that why we choose this tiny thing, to build a new portable product.
+
+We believe perfect size will completely change the way we think.
+We also believe in delicacy and better experience, which are essential for electronic circuit board.
+
+After trying a number of power supply solutions, we found that none of them is elegent enough.
+So we decide make it by ourselves. 
+
+We call it PiSugar PowerPack — a power module specially designed for raspberry pi zero/pi zero w.
+
+![PiSugar Demo](https://raw.githubusercontent.com/JdaieLin/PiSugar/master/demo.gif)
+
+
+## Features
+
+#### Perfect Size
+The sizes of circuit board and bettery perfectly match raspberry pi zero. You can easy put your prototypes in small cases.
+
+#### Easy to Install
+Install in one minute. No need for welding. Friendly for beginners.
+
+#### USB Charging
+Charge via micro USB port. Also you can charge when it is running a raspberry pi zero.
+
+#### On-board Switch
+One tap to turn on, dual taps to turn it off. No need to detach.
+
+#### Place It Anywhere
+With iron sheets inside, you can place your pi zero anywhere with magnet.
+
+
+## Detail
+
+Right now there are two beta version under testing. Official release will soon be available in Aug 2018.
+
+|  | PiSugar PowerPack M | PiSugar PowerPack L | 
+| - | :-: | :-: | 
+| Output Voltage | 5V | 5V | 
+| Current Capacity | 1.2A | 2.5A | 
+| Battery Power | 900mAh | 1200mAh |
+| Battery Life | 3 ~ 4 Hour | 5 ~ 6 Hour |
+| USB Charging Port | mircoUSB | mircoUSB |
+| Size (board) | 65x30x1.5 mm | 65x30x1.5 mm |
+| Size (battery) | 65x30x4 mm | 52x27x10 mm |
+| Weight | 39.5g | 44.5g |
 
 ![Easy to install](https://raw.githubusercontent.com/JdaieLin/PiSugar/master/installation.gif)
+
+
+## Contact
+If you are interested in PiSugar, you can follow our PiSugar github project. It will be updated as soon as we have any progress.
+https://github.com/JdaieLin/PiSugar
+
+Also you can contact us via email: pisugar.zero@gmail.com
+
+