If powersaving is enabled, and it's active, the openSPOT2 consumes much less power. Powersaving is active if the standby LED sequence is blinking in a much lower interval. The openSPOT2 can only enter powersaving state if the web interface is not open and there are no ongoing calls.
Enabling powersaving reduces the LED's brightness, turns off the USB serial console feature, and puts the Wi-Fi interface into power save mode. The built-in LLMNR and MDNS servers may not function properly in this mode, so opening the web interface by entering the openSPOT2's hostname into the browser (example: http://openspot2.local) may not work reliably. Use SharkRF Link to open the web interface.