Hi  Am i crazy if I want to connect an external power supply to the fiabr door sensors ? The idea is to use the sensor with the battery so in case the power has gone off the sensor will continue to work.  Required:  - rechargeable battery 14250 - This one to provide 220V-5V  Please login or register to see this link. - It will be connected to this one to have a recharge module and not overload the battery Please login or register to see this link. For less than 10 euros we have a powered z-w