SixFab UPS : 18650 Battery Specs (protected? max capacity)


have just built up my UPS Hat, and had some questions

  • the docs say “1-cell 3.7V rechargeable Li-ion battery (Flat top unprotected 18650 battery)”, my local shop only has protected flat-top batteries, will these work in the UPS hat or must it be unprotected?

  • what is the max capacity battery i can use with the UPS Hat? will a 3500 mAh battery work fine?

  • does it have to be a flat-top?


  • The HAT already has protection, the protected battery does not fit in the socket.
  • No maximum capacity limit. It is enough to have 1 cell.
  • Yes, it does.