My mobile phone brand is Xiaomi Poco X3 NFC and I want to share my mobile internet data with my PC using the Bluetooth tethering feature because tethering over Bluetooth consumes less charge from my mobile battery. According to my tests, Bluetooth tethering shares mobile internet with a maximum speed of 1.5 Mbps.
Is there a solution to remove this speed limit? How can I test the maximum internet transfer speed from my mobile Bluetooth tethering?
Note that I don't like to use USB tethering because I can't prevent my mobile from charging through USB after tethering and it may damage the battery. And I don't like to use WiFi tethering too because it has high battery usage and has a lot of connection failure.