Battery Backup For Laptop When Power Outage?

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  1. Posts : 19,214
    W11+W11 Developer Insider + Linux
       #161

    paulyjustin said:
    Hey all. So i think i will just buy the UPS 1500va/900W for now. Good decision or not? If so, i will make the purchase soon and then let you all know how it works.


    I mean its always good to have a UPS right? However, the power surge that i use where i plug all my electronics such as laptop, modem, monitors seem to work fine if power outage happens. Again i never had a UPS ever.
    Yes of course. It's good to have something like that but not all UPS have much of overvolt protection or voltage correction. Most are made just to provide enough power to safely shut computer down, not to run it for hours. Seen how laptops use much less power and also have own battery it should provide enough power for many hours.
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  2. Posts : 1,503
    X
       #162

    This is not nearly powerful enough.
    paulyjustin said:
    Hey all. So i think i will just buy the UPS 1500va/900W for now. Good decision or not? If so, i will make the purchase soon and then let you all know how it works.
    I was exaggerating a bit when I recommended a nuclear power plant. (Just a little.)

    But 1500 VA is too little. Go for at least 4500 VA. Minimum.
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  3. Posts : 3,986
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #163

    margrave55 said:
    This is not nearly powerful enough.I was exaggerating a bit when I recommended a nuclear power plant. (Just a little.)
    But 1500 VA is too little. Go for at least 4500 VA. Minimum.
    4500 VA for a Laptop and monitor?
    I have installed a 1200VA UPS for a small office (3 desktops + cable modem + router) and replaced the battery with 2 x (12V&65Ah) batteries.
    It last for 3 hours.

    Read my post # 146
    Battery Backup For Laptop When Power Outage?
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  4. Posts : 1,035
    Windows 10
    Thread Starter
       #164

    margrave55 said:
    This is not nearly powerful enough.I was exaggerating a bit when I recommended a nuclear power plant. (Just a little.)

    But 1500 VA is too little. Go for at least 4500 VA. Minimum.
    Isn't anything over 1500VA specialized?
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  5. Posts : 1,035
    Windows 10
    Thread Starter
       #165

    @Megahertz


    So you bought a 1200va one? Im confused waht you meant you replaced the battery with those batteries and it lasted 3 hours.


    So me buying a 1500VA/900W, that should or could last 3 hours?
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  6. Posts : 3,986
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #166

    Did you read my post #146?
    Battery Backup For Laptop When Power Outage?

    The UPS has a nominal VA and a W rating that should be higher than the load.
    If you want to power only a Laptop and a Monitor, a small 250 W UPS will do the job.

    But all UPS has a battery to last only minutes. The CyberPower CP1000PFCLCD (1000VA / 600W) has a Battery size of 12V/9AH.
    So 250W load will drain 250/12= 20A then 9/20= 0.45 h or 27 min
    If you want to have 8 hours you must replace the 9Ah battery with 20x8= 160Ah (two large car batteries in parallel).

    I would buy a small sine wave UPS and replace the batteries.
    It will cost 130+200+200 = US$530
    CyberPower CP850PFCLCD UPS 850VA / 510W PFC compatible Pure sine wave - Newegg.com
    12V 80AH Sealed Lead Acid Battery


    The UPS and a small generator will cost much less
    CyberPower CP850PFCLCD UPS 850VA / 510W PFC compatible Pure sine wave - Newegg.com
    1200W 4 stroke gen
    900W 2 stroke
    Last edited by Megahertz; 01 Jul 2019 at 08:36.
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  7. Posts : 1,503
    X
       #167

    Well .... don't forget who this is intended for.
    Megahertz said:
    4500 VA for a Laptop and monitor?
    I'm only lowering my recommended power rating to 4500 VA because the nuclear power plant solution is a bit overpriced. Not to mention the regulatory hassles.
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  8. Posts : 1,035
    Windows 10
    Thread Starter
       #168

    Okay i am ordering the 1500va/900w. I will let you all know how long it last my laptop when i do a test.


    One last question.


    I recalled i posted this earlier in the thread. This seems to have 50000mah. Does anyone know if this is compatible with the dell xps 15 9550? Because this is 50000mah.. that is like almost 3x the dell pw7015l power companion i have which is 18000mah.


    It seems to say up to 130W so wouldn't this support the dell xps 15 9550? But i guess it probably doesn't?


    https://www.amazon.com/MAXOAK-50000m.../dp/B00YP823NA
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  9. Posts : 1,035
    Windows 10
    Thread Starter
       #169

    This was posted by someone a while back in an amazon review of it.


    So that means this would work or not for my situation? This person seems to say if you are web browsing or doing light things, it should have no issue. This person says its great value compared to the power companion which makes sense because if it gives like more than 2.5x the mah.... 50000 compared to 18000... wouldn't this be considered very good if you want backup battery and don't bring it outside and carry it and keep it in apartment or house? I already ordered the 1500va/900w ups already but now i see this... then i review an old review about this.... im thinking this probably would work?


    I've been using this behemoth of a battery bank for the past while now with my Dell XPS15 (9550) and have some preliminary thoughts on it so far.

    First off, this thing is a brick. I measured the unit along at about 1.2kg, heavier than some laptops now! All that battery capacity has to go somewhere I guess. The advantage of this is, it can pretty much keep my XPS15 (another note, the battery bank comes with an adapter for the larger of the 2 Dell power plugs in use. My laptop uses the smaller one so had to get an adapter cable for it to work, but it works fine) juiced up for light use for an entire day, keeping the battery at a constant 90% (a setting I chose as the max level to charge the battery to to preserve its lifespan). You could be sitting in a library or something from opening hours to close with no need to be near a plug point if you're mostly just web browsing, listening to music etc.

    Now for the limitations, the battery bank is rated for a max of 3A at 20V, equating to 60W of power. My XPS15 comes with a 130W power supply, and will consume that much while under a heavy load using the CPU, GPU and charging the battery at the same time. As such, the battery bank is fine to keep the battery topped up and not charging or gaming, or to charge the laptop while it is turned off. Once the laptop asks for a heavier load however, such as to start charging while switched on, or a game is fired up, this trips the overcurrent protection in the battery bank, immediately shutting it off. This is more of a safety feature than a flaw, but still makes it slightly frustrating to use at times. It would be nice if there was a way for it to tell the Dell laptop that 60W is all that is available, so the laptop can either charge more slowly or use a combination of port power and battery power while gaming. As it is, you have to turn off battery charging to use your computer while plugged in, or turn the computer off to top up the battery to full. Keep in mind, this only applies cases like mine where I am trying to power quite a high powered computer. Smaller laptops such as the XPS 13 which only come with I believe a 45W power supply would be completely fine.

    Overall, despite the limitations, I'm quite happy to have the battery bank available. It's better value for the capacity compared to the official Dell laptop battery bank (which admittedly does work flawlessly) while still being useful in quite a lot of applications. I don't see this being a must have device for most people, as battery life is generally good enough for most people on plenty of lower powered dual core computer out there that having a massive brick like this makes no sense to carry around. Even for me, it will likely serve as an emergency backup for when I really have to be on a long trip somewhere with no access to a power outlet (keep in mind, no flights for this thing! Too much Lithium I believe) while still trying to get a lot of CPU intensive tasks done (photo editing etc).
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  10. Posts : 3,986
    Windows 7 HP 64 - Windows 10 Pro - Lubuntu
       #170

    paulyjustin said:
    One last question.
    I recalled i posted this earlier in the thread. This seems to have 50000mah. Does anyone know if this is compatible with the dell xps 15 9550? Because this is 50000mah.. that is like almost 3x the dell pw7015l power companion i have which is 18000mah.
    It seems to say up to 130W so wouldn't this support the dell xps 15 9550? But i guess it probably doesn't?
    https://www.amazon.com/MAXOAK-50000m.../dp/B00YP823NA
    I would say that your consumption is less then 130W. So the answer is yes, and it will last about 2.5 hours.
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