Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Battery Backup For Laptop When Power Outage?

03 Oct 2018   #1
paulyjames

Windows 10 Pro
 
 
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 & Notebook-Most of Sony Dell Hp Toshiba Samsung Lenovo Acer IBM NEC Mobile Phone Tablet(not for Apple Laptop) : Computers & Accessories

Amazon.com: AC Outlet Portable Laptop Charger (TSA-approved), Jackery PowerBar 77Wh/20800mAh 85W (100W Max.) Travel Laptop Power Bank & External Battery Pack Compatible with MacBook, HP,Thinkpad and other Laptops: Cell Phones & 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?


My System SpecsSystem Spec
.
04 Oct 2018   #2
F22 Simpilot

Windows 7 Ultimate x64
 
 

Look at a UPS. A UPS stands for Uninterruptible Power Supply. It's a battery that will kick in withen milliseconds of a power failure. It takes 12 volts and converts it through an inverter to 120 volts.

I have this one: Amazon.com: CyberPower CP850PFCLCD PFC Sinewave UPS System, 850VA/510W, 10 Outlets, AVR, Mini-Tower: Home Audio & Theater

Fakespot | Cyberpower Cp850pfclcd Pfc Sinewave Ups 850va 510w Pfc Compatible Mini Tower Fake Review Analysis


It's connected to a desktop with two monitors and a 5.1 speaker system with sub woofer. It says I have 15 minutes time when the power goes out. Which is fine by me since I can safely shut down the computer if there is a power outage. With something like a laptop I imagine the battery would last a lot longer. Maybe 2 hours. Though I'm not sure.

Depending on the capacity of the battery, you'll have a longer run time. And that depends on the mA consumption of the laptop. If you need 8 hours, then you would have to buy several UPSs. That would be a pricey endeavor.
My System SpecsSystem Spec
04 Oct 2018   #3
paulyjames

Windows 10 Pro
 
 

Hi there. So power bank and UPS are not the same thing?


Well i would want to be able to use the laptop for few hours more. Thus i have about 2 hours on my laptop with full battery... maybe 2.5 hours at most. But could i get about 3 hours at least with a power bank? Im confused with the power bank vs UPS here. Because power bank won't work with desktop right? I only would use it for laptop.
My System SpecsSystem Spec
.

04 Oct 2018   #4
Barman58

Windows 10 Pro x64 x3, Ubuntu
 
 

The basic difference between a power bank and a true UPS is that ...

a Power Bank is just a basic external battery which are used to keep low power consumption devices, (Phones, Tablets), running, or more precisely charged, when Mains charging is not available They just feed 5V DC to the charging port when manually attached to the device.

A UPS system uses a Battery pack and inverter technology to supply a continuous AC supply, (110V or 240V AC as required by locale), to the device that is permanently connected to it, the connection is such that when the power is running correctly the UPS Battery is Bypassed, (as is the laptop battery itself), and the system instantly switches in the battery power when the AC power fails.

To power any device that normally required a mains supply in an emergency aa UPS system is Ideal, but this uses heavy Lead Acid battery packs and therefore is not portable, whereas a Power Bank is portable but I have not seen one that can supply any type of Laptop or desktop as the weight of the batteries needed would defeat the object of the exercise.

Some professional level Laptops my have larger power batteries available to extend runtime but these, as with most bespoke items, will be expensive.

If you needed a longer power run for your usage of a laptop you could setup a correctly specified UPS at a location and run the laptop from this units mains output and set it to supply power unsil exhausted and then allow the laptop to use its own batteries, but you would not easily move things around.

to Set things up you need to specify exactly what you need - APC are the "big name" in UPS systems for small users and there sizing tools are here APC offers selector tools to help you choose the product you need - APC United Kingdom so you would enter the current and voltage requirements of the laptop and the required run time and these will suggest a suitable unit.

I use a 2.2KVA [2200VA] unit to protect my Desktop system and Monitor for around 30 Minutes from power failure - Laptops use less power so this size may approach your needs
My System SpecsSystem Spec
04 Oct 2018   #5
PAWOODCHUCK

Win7 64
 
 

What I have done was with my APC-UPS in the past was too remove the 12V battery and run wiring out of UPS to a auto battery. I was running a BBS and could go for 24hrs before battery discharged. Today most UPS are 24V so would need to use 2 batteries wired in series.
My System SpecsSystem Spec
04 Oct 2018   #6
Lady Fitzgerald

Win 7 Ultimate 64 bit
 
 

Quote   Quote: Originally Posted by PAWOODCHUCK View Post
What I have done was with my APC-UPS in the past was too remove the 12V battery and run wiring out of UPS to a auto battery. I was running a BBS and could go for 24hrs before battery discharged. Today most UPS are 24V so would need to use 2 batteries wired in series.
How long did it take the UPS to recharge the battery or did you have to use a separate charger to recharge the battery? If the latter, did you have to disconnect the battery from the UPS to charge it or could you leave it connected and continue to run it?
My System SpecsSystem Spec
04 Oct 2018   #7
PAWOODCHUCK

Win7 64
 
 

I just let the UPS recharge the battery. Not sure how long but always was ready for next power issue.
My System SpecsSystem Spec
05 Oct 2018   #8
Megahertz07

Windows 7 HP 64
 
 

Quote   Quote: Originally Posted by PAWOODCHUCK View Post
What I have done was with my APC-UPS in the past was too remove the 12V battery and run wiring out of UPS to a auto battery. I was running a BBS and could go for 24hrs before battery discharged. Today most UPS are 24V so would need to use 2 batteries wired in series.


A UPS has two main parts:
- A AC-DC (charger and battery).
- A DC-AC (inverter).

The power capacity is defined by the inverter. If you want a UPS to hold a computer, a modem, a router etc you have to to sum up the individual powers and apply a factor of 150%.
For example:
Laptop PS 19V - 5A = 95W
Modem PS 12V - 3A = 36W
Router PS 12V - 3A = 36W
Total = 167W x 1.5 = 250W
The ups should be at least 250W.

If you want it to have power for 10h, the battery must be at least 250*10 = 2500Wh. If the battery is 12V, the battery capacity is 2500/12= 210Ah.

The UPS would be a small one but the battery very big (probably 3 x 70Ah, 12V in parallel)
My System SpecsSystem Spec
Reply

 Battery Backup For Laptop When Power Outage?




Thread Tools




Similar help and support threads
Thread Forum
Can i run my laptop on AC power (without removing the battery) ?
I always use my laptop directly on AC power (removing the battery) unless I am travelling or there is no source around. But can i run it on AC power without removing the battery and when AC power turns off the laptop automatically going to run on battery ?
Customization
I have no sound when my laptop is on battery power
It goes like this: my laptop is normally plugged in, high performance power settings, battery taken out. Every once in a while I put the battery in and use it with normal charge/discharge cycles, power saving settings. Now it somehow happened that when I put the battery in and windows booted up I...
Sound & Audio
BSOD After Replacing Battery on Laptop, Power Driver Failure
I've read around a bit but nothing seems to be fixing my problem. My battery on my laptop died a few months back. I got the battery replaced last month and ever since I've been experiencing the BSOD for power driver failure once or twice a day. It rarely occurs while the laptop is in use. It's only...
BSOD Help and Support
BSOD following power outage
Hello, I have been trying to sort out my computer for about a week now. My husband turned on my computer a few hours prior to the arrival of Hurricane Sandy and forgot to shut it down. We lost power and it was not shut down properly. I get a BSOD when Windows loads and gets to the login...
BSOD Help and Support
BSOD when running laptop off battery power
About 4 months ago I performed a number of upgrades to my 4 year old Lenovo SL400 laptop. I upgraded to a Seagate Momentus hybrid drive, upgraded my CPU, installed new RAM, purchased a new 9-cell battery and performed a clean intstall of Windows 7 Home Premium 64-bit (the computer came with...
BSOD Help and Support


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 00:03.
Twitter Facebook Google+