PSR 800 battery alert tone values

[SYZ1165]

Hello to the group, I have a PSR 800 scanner and I am totally frustrated with the battery alert tone values are there any new updates or posts that someone could share that would show the bars 14 through alert tone and if they work well for their PSR 800? I’ve entered values from forums from a few years ago I have a 2500 mA battery and either I did not get a tone alert or sometimes when I do get the tone alert it lasts for over 30 minutes before the scanner finally dies can someone please help