I'm currently building a retro gaming console, based on the same parts as the Portaberry Pi Ultra but with some tweaks. There are multiple devices powered by the Raspberry Pi 3B itself :
- A 5" HDMI Touchscreen with backlight
- A mini amplifier with 2 little speakers
- A Teensy LC
- A PiRTC clock with its coin cell battery
Now, I am currently using a PowerBoost 1000C with a 6600mAh battery, but it doesn't seem to be enough. When sending a game via WiFi or running an emulator, the low power icon can be seen in the top-right corner of the screen. When running a heavy core (such as PPSSPP, a PSP emulator), the FPS drops when the low power icon shows up. The low power red LED of the PowerBoost also flickers. When directly using my Raspberry Pi power supply, I don't have any problem.
How could I solve this problem ? Is the PowerBoost faulty, or is it normal that it cannot provide enough power for all this ? What alternatives could I use, a smartphone power bank maybe ?