Zend certified PHP/Magento developer

How to ensure computer is power on always?

I would like to have my computer to turn on in all cases wall socket electricity is on. I know there is a BIOS setting for it,

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but I am not sure I can rely on this: battery can discharge or induction can happen so that BIOS set to factory default.

Can I configure it in hardware, may be some jumpers or short circuit power on switch?