I purchased two CubeCell 1/2AA 433Mhz modules and tried to test the communication range at a maximum power 22dB with small antennas from the kit and powered by USB.
The sketch was written based on “LoRaSender_ReadBattery”.
The settings are:
indoors with a distance between the modules of 2m RSSI = -37, SNR = 6
in open terrain the maximum range was 1.3km with RSSI = -98, SNR = -22
I do not have instruments for accurate measurements, but in my opinion, the modules do not give out 22dB. The signal is too weak already at 2m and the maximum distance in open areas is only 1.3km.