Have been using the sensors for a month and the battery level showing 99% on the config screen

Hi,
Have been using the sensors for a month and the battery level showing 99% on the config screen. Also my data from the sensor is like this:
{
“firmware_version”:3,
“transmission_count”:170,
“reserve_byte”:0,
“battery_level”:3.29406,
“type”:29,
“node_id”:0,
“rssi”:100,
“temperature”:39.49,
“pressure”:1007.64,
“humidity”:56.636,
“gas_resistance”:1.294686e7,
“iaq”:21
}
Here what does the battery_level mean? Can you please shed some light on this. Thanks.

Hi,

This is normal. The batteries installed are Lithium Ion batteries which hold voltage linearly for a very long time, however once they begin to loose capacity the voltage level drops steeply.