Hello,
This is a feature request for all drones that use DJI Fly, more precisely, this should be implemented in the app, it wouldn't require a firmware update.

A simple option that can be turned on, to be able to monitor the lowest cell voltage at the current moment near the battery indicator on the top of the fly app.
I know it is already possible to do so from the Battery Info menu in Safety Settings, however having it always visible without the menu overlapping half of the screen is handy.
For example, when flying older batteries, or in colder conditions, it is important to constantly monitor the lowest voltage so you don't get into a "forced landing" situation.
For those unaware - forced landings do not only happen if the battery percentage is low, but also can happen if any of the cells in the battery go under 3V, be it from the load, stress, weather conditions, pressure, or anything else, if the voltage goes down, your drone is going down too, no matter what. And this can be dangerous in some situations, so it is pretty useful to know the voltage during the flight to make sure you're not stressing the battery and that it is not going to misbehave.

This feature was available in DJI Go4, so it should also be available in DJI Fly, maybe not by default, something that you enable in Battery Info menu, but it definitely should be an option.
DJI, please consider adding this.
Thank you so much!

Hi, Yaros1. Thank you for your feedback. We understand how this option would provide convenience and ease of mind for our DJI Pilots. We will voice your suggestions to our DJI Developers for attention. Significant suggestions will be implemented via the firmware update, app update, etc. For any updates, please stay tuned to the latest news on our DJI official website at (www.dji.com).
Should you have further concerns, please reach back here at DJI Forum. Thank you, and have a nice day!