MQTT Battery shows as % not voltage

Thank you for taking the time to submit your bug/issue! Please use the points below as a guide when submitting.

I am using MQTT to send data.
The log show the battery information batt,v=2.90
The display show a battery device, but value of 3% in Red by default.
The battery icon shows almost discharged and red.
I change the setting ranges with 2.8 to 3.3 as green.
The 3% turns Green and the battery shows green but the icon shows almost dead.
What am I missing

which device are you using?