Internal lithium battery board insertion point

#1

Where would be the best point to inline a lithium battery and charger in-line with the main USB power and data port? The idea would be to add an internal battery to the axoloti with inline charging circuit that would be able to:

  1. Power the device and the USB Host port when the Micro-USB port is disconnected
  2. Charge the battery and keep the device powered when the Micro-USB port is connected
  3. Add a power switch so the device can be powered off ( Ideally while the USB port is still charging the battery )

I'm thinking about a circuit that would be similar to Adfruit PowerBoost 1000 Charger paired with a good sized battery.

I'm planning to turn my Axoloti into my main portable controller interface, for a battery powered minimalist jam setup.

Thoughts?

#2

Easiest way is to run your patches on startup from SD card on the Axoloti, and plug a USB powerbank into the micro USB port on the Axoloti.

I think the ideal insertion point would be to desolder the barrel connector, and connect your board to that. Note that the Adafruit board only outputs 5V, and I think you'll need more than that.

#3

@Olivier My two self powered examples:

#4

did your tests get you any further @Olivier??