How to read different battery values?

[HolgerAusB]

I have two temperature/humidity sensors, which uses different formats and I want to know, which values I have to expect.

Both sensors with new batteries:

1.) rtl/20/99/battery_ok => 1
I assume the values are 0 for low and 1 for good/OK

2.) rtl/112/999/battery => 2
But how to read this? Will there be a third value 0, 1, 2 which lets say 1 means 50% ?

I do need a percent level. So I use NodeRed, which is reading above values from mqtt and set a new topic ../battery_level to 100, 50 or 10, depending the sensor and its value. So I need to know which values may occur and needed to be handled properly.

Of course this percentage isn't all but accurate. But it helps to monitor the batteries in Apple HomeKit (via homebridge-mqttthing)

[zuckschwerdt]

The battery flags for this device have not been mapped. It would be a great addition if you can find out what the flags mean.
Run the decoder with -R 112:v and try with and good, weak, bad batteries, maybe use a variable power supply.
Note the codes for each experiment and what flag values you'd expect. Thanks!

[HolgerAusB]

Thank you, will prove this, when the batteries get lower. I had hoped, that there is a common use in rtl for the different parameters

[zuckschwerdt]

Some common fields are listed at https://triq.org/rtl_433/DATA_FORMAT.html but battery is special (unknonw) here.