Is the apc back-ups es 700 beeping with long beeps?

Question

Uninterruptable power source

The uninterruptible apc back-ups es 700 squeaks with long beeps and this repeats every 2-3 days.
How to understand that the matter is in the batteries? the breaker is about 10 years old.
How to connect an uninterruptible usb to a computer? I don’t understand what kind of cord and where to connect it to the uninterruptible power supply

Answer 1

put the PowerChute program
on RJ45, look at the icons on the outputs
one - there is control, it is separate, xs is drawn there that
the other two are protecting the patch cord for the computer, if it suddenly shorts the voltage to the network,
the input and output are drawn there