Missing low battery alert during activity

Hi,

There used to be low battery alert during activity - for example if the battery remaining charge reaches 10% or less, during activity, an alert is generated.

With one of the firmware updates, in the last 1-2 years, that feature disappeared. Now low battery alert is produced only when not in activity. During activity the only battery alert is when the battery charge reaches critical level (1-2%).

How can I enable low battery alert during activity?

If it was removed - why? I find it extremely useful to have.

Thank you,

ud.