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I'm working on a project, here's the deal... I have 2 raspberry pis (3B, and a zero w) and 1 battery (3.7V LiIon 1200mAh). I bought a PowerBoost 1000 (A "DC/DC boost converter module can be powered by any 3.7V LiIon/LiPoly battery, and convert the battery output to 5.2V").

I'm planning on adding a 3.5 TFT screen to the pi zero, I would like to power both raspberry pis with the PowerBoost. Is this possible?

If not, is there a way to use the GPIO pins of the raspberry pi 3B to power the Pi zero?

  • You can run both, but it will only run for an hour. It is possible to draw ~1A from the 5V pin on the Pi3 header, and you could use this to run a Zero, although it is difficult to imagine why. – Milliways Nov 16 '17 at 2:13
  • 3.7V at 1.2 Amp boosted to 5.2V would be below 1 Amp. Don't think the Pi 3B would would run on 1 Amp. – bstipe Nov 16 '17 at 4:38
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    @bstipe: The battery is rated at 1200mAh ... However, that does not mean that the battery can source a maximum of 1.2 Amps at 3.7 V. It means that it can supply 1.2 Amps at 3.7 V for one hour. If the current demand is more than 1.2 Amps, then the amount of time until discharge is shorter than one hour. ... in reference to "Can the battery supply the necessary current to run multiple Pi modules as well as a screen?" ... I don't know. Give it a try on one module and the screen... and then add another module while measuring the voltage output of the DC-DC converter; if it drops below 5V. – RubberStamp Nov 16 '17 at 23:40

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