“How long will this product provide power to a laptop if the laptop is turned off to keep the laptop battery powered in the event of a power outage?”
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You will probably get several full charges out of it. I have a Mac plugged in and at fully charged backup system it will give me 179 minutes of work time.
Sorry, there was a problem. Please try again later.Thank you for your inquiry. It would depend on much power the laptop draws from the unit. If the laptop draws around 200 watts of power then it would provide 32 minutes of runtime in addition to the internal battery in the laptop. If the power draw is lower then the runtime will be higher. If the power draw is higher then the runtime will be lower.
Sorry, there was a problem. Please try again later.There's a lot of misinformation out there. No, a laptop doesn't draw 200 watts, not even close. Especially when it's OFF as the question asked. If running a full size 15" laptop while doing 3D rendering games or video editing you can get some to use 25- 60Watts load but that's rare. Most laptops will idle along showing web pages no problem while using 5-15 watts. Android tablets draw even less, particularly small ones. Some will run on 1 watt and can do all day. Charging a 12" Apple Ipad Air will draw around 1.4 amps steady. It's much less when running and not needing to charge the internal battery. Their spec says up to 2.5 amps charge rate but in practice they rarely pull that much. To get watts from the amps it would be 1.4A x 5V (on USB) = 7 watts draw while charging for that one. Some higher speed USB charger claims 50W or even 100 but that's specialized certain cases and batteries won't last very long charging too fast like that as they heat up. Don't let any battery run down to zero or freeze. They almost never recover fully and they're capacity goes way down after a hit or two like that. Then it has to be charged all the time since it's lost most of it's capacity. Ok, moving on.... The main load of portable devices is the CPU, GPU and screen. Turn the LCD brightness down and it runs longer. Also don't run 20 browser tabs, 3D games or 9 programs at once and it will run far longer on the battery. The main answer is the laptop won't draw barely any power when it's off. Set the laptop to "sleep" mode and it will take a tiny amount to run it. like 0.5 watt. The internal battery should be able to run that way for days so you don't even need a UPS if the laptop will be off till you need it. Even better, set the laptop to hibernate mode where all changes are written to the disk and it shuts off fully. Then it can sit for years no problem since it's off. If he wants his laptop available for long time periods with the power out then do that. The other option is to get a 2nd laptop battery you can swap it out or get an extended run time battery. Some can go 15 hours. Business class laptops have replaceable batteries. Cheaper home ones, not so often anymore. Apple ipad, iphone, etc you can't remove the battery or do anything with it. All glued shut and only 1 USB port. Sorry. No replaceable battery options there. A UPS will typically discharge itself in 1 -2 hours even with no load since they are very inefficient. Running it's own step up voltage converter circuits will run most units down in 1.5 - 2 hours even with zero load. That's why they won't print the total runtime with a small load. Because it will go dead anyway. If the battery is 100% full and new the APC Back-UPS Pro, 1500VA specs are shown below (as per APC): 900W 3minutes 500W 9 minutes 250W 25 minutes 100W 1 hour 50W - APC says the load is too low. 10W ( APC says the load is too low and won't print the run time. It must be 90W or higher, so they say. They won't show run times for a load below 90W because the unit will run itself down anyway in 1 -2 hours. Note the run time drops very fast as the load gets larger because in addition to the larger load it has much larger internal losses as the load increases That's why a 900W load only goes 3 minutes. usually less. If the battery is less than perfect it will be a lot less than that, or not at all. Eaton and APC both make decent quality units. Eaton costs a bit more for good reason. All brands make a wide range from cheap to pretty good. Higher grade units have a real Sine wave output when on battery mode, most do not. A real, smooth sine wave is easier on electrical components and works better for critical equipment, audio gear, etc. cheaper units have a stepped, squared off, modified sine wave that's sorta like a sine wave. PFC (power factor correcting) power supplies can handle it. other things may not like it too much. Be careful of cheap Cyber power units due to safety reasons. they had several models with conductive yellow glue inside for years to hold components in place. That's common in other brands but the glue they used gets darker and conductive over time as it heats up. Some catch on fire. You can look it up and there are directions on what to do about it to be safer.
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