Shelly H&T rechargeable battery adapter for AA LiFePo4

Adapter for the Shelly H&T  allowing use rechargeable AA LiFePo4 instead of a CR123 battery.  It uses poka-joke to prevent wrong connection of the battery or Shelly sensor.  

You do not need solder. I used the jeweler copper wire and  battery clips    to connect the battery. 

I recommend use only LiFePo4 with 3.2V nominal Voltage, using 4.2V Lion battery can damage your Shelly H&T.