Great build and great report Jerommel, thank you for that.
Might try to put LH351D in mine if I manage to fix the switch failure….

There are some cylindrical LiPos as well.
My favourite example:

It’s my favourite because:

  • it’s from a good manufacturer, not some random Alibaba listing
  • specs are outstanding, compare that to the best 14500
  • they stopped making it though