Check to see if the battery you're using has a bitter coating.
We recommend avoiding CR2032 batteries with a bitter coating for your 4iiii products. These batteries can cause connection issues.
The bitter coating, often found on the negative side of batteries like the Duracell CR2032, has been shown in tests to be non-conductive. This can lead to connection problems or dropouts with your 4iiii power meter.
Batteries with a bitter coating display this symbol: