- have one… small and handy


EasyVR 3 Plus is a multi-purpose speech recognition module

Nano Power Timer - TPL5110
NanoVNA
and a complete review at:
ordered! thanks for notification
These are nice batteries now at a good price - don’t see enough of them in IoT projects, great specs especially on low temperature operation
They fit into most 18650 holders, just twice as tall
Review: https://www.thunderheartreviews.com/2018/08/boston-power-swing-5300-li-ion-cell-test_24.html
Since last year I just use metal clips for the 18650 batteries, they take anything 
https://www.digikey.co.uk/product-detail/en/keystone-electronics/54/36-54-ND/2254090