Handset Low Battery Warning - Beeping has stopped ...

I have FIVE Diverse 6210 handsets around the house and have currently replaced all the batteries in all the handsets.
Before i replaced them, when the batteries got low the handsets started beeping so i knew i had top put them on charge. Now after replacing the batteries the warning beep has stopped. This has happened on ALL the five handsets. I have even tried putting the old batteries back in but still no beeping.
I have replaced the batteries with the correct re-chargeable batteries as stated in the instruction book.
I have found it useful to know when they need charging by the beep - anyone has ideas or help would be appreciated.

Yeah, this is really weird. I have a thread going on complaining about the same thing and I cannot figure it out. My computer will just die anywhere from 42-80% battery life remaining. I mean, it's really sporadic. Not only that, my battery health keeps fluctuating from 38-45% and at very short and random times, 91%. Every time the computer dies while running off the battery, the battery reads at least two bars of charge left...but when I try to turn the computer back on, it will die a couple of seconds in. Let's not mention how my battery is never fully charged either. It will say 100% charge, but when I take my power cord off and then wait 30 seconds and put it back, it will say 93-97% charged. Give me a break, there is no way 30 seconds of battery power is going to diminish the charge by 3-7%.
I have no idea what is going on, but Apple should stop buying batteries from Sony. What a disaster this is.

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