First checkin

README.md

@@ -1,3 +1,28 @@
 # batteries
 
-Customizable battery storage
+Customizable battery holders for different sizes connectable to each other.
+
+Instead of holes or cubes for each battery, there is a width of the
+battery holder and a long cutout centered on the width. The cutout size 
+is choosen by the maximum number of batteries of the selected type which
+fit into the cutout (battery diameter + a small offset)
+Each holder holds one type of battery in at least one line.
+The battery holders may have two holes on one side and two connectors
+on the other side to connect the different holders. The position of the 
+box is important for the connectors to be appied.
+
+standalone
+: no connectors are applied
+
+top
+: only the connectors are appied at the bottom of the box
+
+center
+: holes are appied at the top and connectors are applied at the bottom of the box
+
+bottom
+: wholes are applied at the top of the box
+
+A single row looks like this:
+
+![image of a single row](/images/batteries.png)