UPS+ is overcharging the batteries?

[check0r0]

I have the issue that since a few days my UPS+ kind of wants to overcharge the batteries.
I'm currently using Samsung INR18650 29E batteries but with different batteries from another manufacturer I had the same issues.
Above 4,50V the device is doing strange squeeking noises? How can I get rid of these problems?

Here a copy of what uspplus_iot is saying:
{
'PiVccVolt': 5.372,
'PiIddAmps': 337.089991589571,
'BatVccVolt': 4.48,
'BatIddAmps': -2835.8536585365855,
'McuVccVolt': 3166,
'BatPinCVolt': 4324,
'ChargeTypeCVolt': 4549,
'ChargeMicroVolt': 145,
'BatTemperature': 52,
'BatFullVolt': 5409,
'BatEmptyVolt': 3701,
'BatProtectVolt': 3700,
'SampleTime': 2,
'AutoPowerOn': 1,
'OnlineTime': 215,
'FullTime': 215,
'OneshotTime': 215,
'Version': 10,
'UID0': '001B000F',
'UID1': '4143570D',
'UID2': '20303330'
}
{"code":0,"reason":"Feed!","id":7386658}

[toruvinn]

I have no idea how you got the battery to 4.48 and why the UPS thinks it can get it to 5.4V, but I'd be very worried about an explosion and a house fire. Those cells, like most, go up to 4.2V, in fact I think I even have two of those here too (the UPS would not stop charging them, but they never went above 4.2V obviously).