Made the holder a little smaller

cad/battery_holding_frame.scad

@@ -3,7 +3,7 @@ baseplate_hole_distance = 56;
 
 battery_x = 105;
 battery_y = 35;
-battery_z = 25;
+battery_z = 21;
 
 frame_x = 10;
 frame_y = 62;