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Battery Backup For Laptop When Power Outage?
Hey all got a question. I have a dell xps 15 9550 laptop and i have it charged into outlet almost always. But if i disconnect it from outlet, i get around 2 hour battery life at the most it seem before i have to recharge it. The thing is when im doing certain things, i have to be connected for minimum 8 hours. Thus if i have a power outage and power doesn't come back, I lose money in what i do. I had this happen several times in the building where i rent from because power outages is very common.
Most of the time, the power outage isn't that long like 15 minutes. But few times its been hours and rare times its a day or so. But my main issue is when im on the computer and i can't have this happen.
I read online about ups etc. But im not sure exactly how that works. Does this mean if you have something like this and then your battery on laptop is running out of battery, you could connect your laptop to it and then charge your laptop like its an electric outlet? If so, could you basically use it like an outlet? Example say you charge it to your laptop at 10 percent battery. Say you have it charged to 100 percent and during this time, you used the laptop for another 45 minutes etc. Now you are suppose to unplug it right? Then now you get another 2 hours of it on battery? Then would there still be enough power in that device to plug it in again and charge it again? Thus it would be another 45 minutes and another 2 hours?
I read that these devices only give you like 25 minutes or a bit more than that. So basically you could never get that much power?
And can someone tell me what are examples of this on amazon?
I saw these power banks on amazon. So is this the type of device that i would need for this? Im not sure if its power bank or UPS etc.
Amazon.com: MAXOAK 50000mAh 5/12/20v Portable Charger External Battery Power Bank for Laptop Accessories
Amazon.com: AC Outlet Portable Laptop Charger (TSA-approved), Jackery PowerBar 77Wh/20800mAh 85W (100W Max.) Travel Laptop Power Bank Accessories
Amazon.com: Omars AC Power Bank, 24000mAh AC Outlet Laptop Portable Battery Pack Travel Charger Output Two USB Ports, 80w Output, 88Wh Universal Travel Charger Compatible MacBook, Laptops.: Cell Phones Accessories
I know that the bigger the mAh, the more it last. But how many hours would it last? Example say you have 2 hours of battery on laptop when power outage happens. Now you have one of these on hand. How many hours could you get additionally with one of these devices? Thus when you plug it to laptop and use it while its plugged in... then unplug it when battery is 100 percent... then use laptop while on battery for another 2 hours... is there still enough power to charge it again or is that already way too much?