Is it possible to lower the current the Bluetooth uses?
https://www.lithiumbatterypcb.com/
I found that if I’m at the Devices tab and it says Scanning for devices, the bluetooth dongle is practically off and thus just barely sips energy, even if it finds your BMS (but don’t connect to it).
I go back there after checking on my cells.
NB: I use the Overkill Solar app.