Most likely cause is that either your power jack is broken or your power adapter is failing, presuming that it is a laptop.
If your beeping alarm keeps going off in the middle of the night, try checking the battery or power source first. If that doesn't work, consider moving the alarm to a different location or adjusting the settings. If the problem persists, contact the manufacturer for further assistance.
If your alarm goes off while you turn your ignition key this could be signaling a problem with the vehicle's power. Have your battery tested to ensure that it has enough juice to power your vehicle. You may then want to look for corrosion on the battery posts or battery cable ends.
probably clock and/or alarm system - draws a lot of power
Take out the PSU (Power Supply Unit) It's the largest box inside your computer with a fan on it. Without power = no computer.
memory is not accessed when the computer is turned off. If the computer is in sleep mode, it retains power until resumed. If computer is in hibernate mode, contents of memory are written to disk first before power off, and reloaded on power on.
CMOS Battery holds power for storing infos.
Energizer batteries are used exclusively to power the Energizer Bunny, which keeps going and going and going...
The power keeps going out due to various reasons such as equipment failure, weather conditions, overloading of the electrical grid, or maintenance issues.
Your hardwired smoke alarm may be going off at night due to dust or insects triggering the sensor, low battery power, or a malfunction in the alarm system. Regular maintenance and cleaning can help prevent false alarms.
Electrical power. Obviously.
uses of power failure alarm
Turn on your computer for a convenient time automatically Go to your Computer Setup (press Del when your PC is loading). Go to "Power Management Setup" and enable " PWron/Resume by alarm" and set date alarm and time alarm and then press F10 to save your change and turn off your PC. On specified date and time, your PC will turn on