Just like to say the Piper Computer is great. I own a number of versions of the Raspberry Pi. The way Piper is packaged just works so well. My daughters both love using it.
We have 2 issues;
The Charging/Pi cable appears to be faulty. Slightest movement of the battery causes the Raspberry Pi to switch off. I have used a standard cable and everything now works
The battery does not last as long as I would expect for a 9000 mAh battery. How long should both the Pi and Screen run for, doing for example PiperCode?
One observation was that the battery was disconnected last night with still 2 lights on the battery. It was then switched off.
The next morning it was dead. This should not be the case.