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A Low battery alarm refers to the CMOS battery on the motherboard itself. This battery is responsible for keeping all your custom BIOS settings and the time on the computer when it's turned off. This battery looks similiar to a watch battery. This is the battery that needs to be replaced.
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A Low battery alarm refers to the CMOS battery on the motherboard itself. This battery is responsible for keeping all your custom BIOS settings and the time on the computer when it's turned off. This battery looks similiar to a watch battery. This is the battery that needs to be replaced.

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Or am I misinterpreting the error and you are getting this inside windows.... not when first booting up?
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Or am I misinterpreting the error and you are getting this inside windows.... not when first booting up?

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I get it in windows and this morning before I logged on, none of these times has been after a restart/shut down though (at least not yet). Could it still be the CMOS batter?
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I get it in windows and this morning before I logged on, none of these times has been after a restart/shut down though (at least not yet). Could it still be the CMOS batter?

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I replaced the battery in the APC and it seems to be functioning correctly now.<br />
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Thanks much for your help!
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I replaced the battery in the APC and it seems to be functioning correctly now.

Thanks much for your help!

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For the past week I have been getting Low Battery warnings on my desktop machine. Machine is plugged in to an APC Back-UPS ES 750. There are no error lights on the APC and the machine is otherwise working fine. Do I have a bad power supply? How can I find out?
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For the past week I have been getting Low Battery warnings on my desktop machine. Machine is plugged in to an APC Back-UPS ES 750. There are no error lights on the APC and the machine is otherwise working fine. Do I have a bad power supply? How can I find out?

Low Battery warning on Desktop computer

Components are those devices that are internal to a computer -- the PC boards, the central processor (CPU), the memory (RAM), disk and video controllers and so on.

Components

A personal computer is a general-purpose computer whose size, capabilities and price make it useful for individuals, and is intended to be operated directly by an end-user with no intervening computer time-sharing models that allowed systems to be used by many people, usually at the same time. Personal computers may be connected to a local area network (LAN), either by a cable or a wireless connection, and through that to the Internet. A personal computer may be a laptop computer or a desktop computer running an operating system such as Windows, Linux or Macintosh OS.