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Message: <blockquote data-quote="Anusha" data-source="post: 269944" data-attributes="member: 828">Oh didin't see these.I didn't buy a battery. Still not sure if I should. Maybe I will drain the full life out of the current battery. <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" />How you PSU should be blamed....When power fails, UPS takes some time to switch to battery mode. Very low, but this is all it needs to reset the PC. The PSU's capacitors should be able to power the PC until the UPS switches to the battery mode. If the PSU is not good enough, the capacitors can't do that - they drain before the UPS is fully switched to the battery mode. When the PC load is more (eg: playing a game), the capacitors will discharge quickly, so there is a bigger chance of discharging them before the UPS switches. This time which the PSU runs with its capacitors is called holdback time. If this is lower than the UPS' switching time, PC will reset.</blockquote>

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