I'd like to wire this bay to the GPIOs of a rpi zero w.

enter image description here

The bay welcomes 2S 2x18,650. On each cell is written "9800mAh TR 18650 3.7v Li-ion".

My requirements are :

  1. One micro-USB port must be able to transmit data to a smartphone, while not charging the phone
  2. The other micro-USB port must serves as a charging port to recharge the 2S
  3. The bay must provide robust (against loads) 5V to the pi, and up to 2A (those are values I found on the internet, correct me if I'm wrong)
  4. The pi will power and exchange data with a USB-device that I hard-wired to the GPIOs as well

What should I buy in order to regulate and accomplish this please?

EDIT : I found this

enter image description here

Will it work ?


  • shopping questions are off topic here – jsotola Mar 1 at 7:17
  • You need a buck converter, 2 cells will produce between 6 and 8.5V and you need to convert it to 5V. Beware, 9800mAh for an 18650 sounds completely bogus, if you got them from a cheap no-name shop they are likely fake. – Dmitry Grigoryev Mar 1 at 8:01
  • thank you, I edited with something i'm not sure whether it's a buck converter or not, and whether it will handle the 2*3.7v, could you confirm it please? – user131094 Mar 1 at 8:18

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