expiredphoinix | Staff posted Oct 23, 2025 03:20 PM
Item 1 of 2
Item 1 of 2
expiredphoinix | Staff posted Oct 23, 2025 03:20 PM
24,000mAh Anker 737 3-Port 140W Portable Power Bank
+ Free Shipping$75
$110
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Compared to almost every other 20-26k power bank, this RECHARGES and does passthrough way better (140 recharge/100W passthrough)
UGreen 165W can passthrough 100W max, recharges at ~60W average.
Anker 165W can passthrough 65W max, recharges at ~70W average.
The only ones that come close are Anker 250/300, Ecoflow 300, and Cuktech 15.
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Don't think I've seen that price since then thought
There are two types of batteries for that model, but based on your CPU specs, let's assume you've got the higher-end version with the 86 Wh battery. Charging from 20% to 85% is roughly 56 Wh of energy.
Most power banks use 3.6V internally. Based on that, a 24,000 mAh battery equals about 86.4 Wh. But keep in mind, power banks aren't 100% efficient.. realistically, you're looking at 80-90% efficiency. Let's go with 85% efficiency, which gives you about 73.44 Wh of usable energy (not factoring in any battery degradation).
Now subtract that from what the laptop needs (73.44 Wh - 56 Wh), and you get a 17.44 Wh difference. So where did that energy go?
Well, we didn't account for what the laptop is using while charging. The Dell XPS 15 9520 can draw up to 130W when charging at full speed. But Dell being Dell (honestly worse than Apple in this regard), they limit full-speed charging to their own 130W chargers. If you're using a regular USB-C PD charger, you're capped at 100W. And at 100W output, the Anker 737 would go from 100% to 0% in about 52 minutes.
Now, your laptop's power draw during regular use (with an i7-12700h and a 15-inch screen) is somewhere between 15W and 40W. Let's go with a middle-ground estimate of 27.5W. Running at 27.5W for 52 minutes equals about 23.84 Wh.
That 23.84 Wh more than explains the missing 17.44 Wh we calculated earlier. So yeah, everything adds up. I don't think there's anything wrong with your charging results.
There are two types of batteries for that model, but based on your CPU specs, let's assume you've got the higher-end version with the 86 Wh battery. Charging from 20% to 85% is roughly 56 Wh of energy.
Most power banks use 3.6V internally. Based on that, a 24,000 mAh battery equals about 86.4 Wh. But keep in mind, power banks aren't 100% efficient.. realistically, you're looking at 80-90% efficiency. Let's go with 85% efficiency, which gives you about 73.44 Wh of usable energy (not factoring in any battery degradation).
Now subtract that from what the laptop needs (73.44 Wh - 56 Wh), and you get a 17.44 Wh difference. So where did that energy go?
Well, we didn't account for what the laptop is using while charging. The Dell XPS 15 9520 can draw up to 130W when charging at full speed. But Dell being Dell (honestly worse than Apple in this regard), they limit full-speed charging to their own 130W chargers. If you're using a regular USB-C PD charger, you're capped at 100W. And at 100W output, the Anker 737 would go from 100% to 0% in about 52 minutes.
Now, your laptop's power draw during regular use (with an i7-12700h and a 15-inch screen) is somewhere between 15W and 40W. Let's go with a middle-ground estimate of 27.5W. Running at 27.5W for 52 minutes equals about 23.84 Wh.
That 23.84 Wh more than explains the missing 17.44 Wh we calculated earlier. So yeah, everything adds up. I don't think there's anything wrong with your charging results.
Well I did a few tests with the xps 15 9520 and the anker 737 and it seems the moment I unplugged xps laptop from outlet and it is 100% and connect anker battery to it, it takes about 1 hour 5 minutes before the anker goes to 0%. So with the math you used, that means my xps is drawing less than 27.5w? I'm confused with the numbers you used. Since the dell charger is 130 watts... how could the xps draw that little amount of watts as in under 30 watts? I would thought it has to be higher?
So you are saying if you have a power outage, you should first connect the anker 737 to laptop and use the anker powerbank up first before you use the laptop battery first? The thing is if I use my laptop on battery at 100% battery, I get around 1.5 hours at the most. It can do 2 hours but that requires a lot of it being idle. So it would last at most 1.5 hours.
If a power outage and I continue using my laptop on battery. That is about 1.5 hours. Then as my laptop is very low in battery at say 20%, I connect the powerbank. Say the powerbank goes from 100% to 0% in about 55 minutes. Does that sound right? Then my laptop battery probably is 55% at the most? So say I get 40 minutes from when the dell xps goes from 55% to 0%. So this way I get about 3 hours 5 minutes.
Compare that to connect the powerbank immediately to my xps when power outage. Well it last 1 hour 5 minutes the anker. Now though the xps battery would go from 100% to 0% in probably 1 hour 30 minutes. So this would be 2 hour 35 minutes?
So shouldn't the numbers be the other way around? I thought you get more battery if you connect the anker 737 first to your laptop as oppose to let the laptop battery go down to 20% before you connect the anker to it? The math is wrong in that calculation?
I can charge my MacBook Pro and phone at the same time on the go
I can get about half to a full charge on my MacBook pro on the go
Why would the old pw7015l 18000 mah powerbank barrel only get 35 minutes with the newer xps 15 9520 only? The current pw7018lc 18000 mah powerbank that is usb-c with the newer xps 15 9520 get 50 minutes when I tested it a while back. So wouldn't the older powerbank that is barrel and same mah be the same though?
Are you sure no adapter exists for that? A while back on dell site, they had an adapter like that but now it doesn't seem to be available anymore. I checked ebay and pretty sure it looked something like this below. So this wouldn't work? The one on dell site a while back looked like this.
https://www.ebay.com/itm/31588623...R8C5
The thing is if I get a new laptop, I don't want the laptop to be smaller screen size. That laptop you mention is interesting. It's a faster processor and has 32gb ram and has a 4050 which is similar to the 3050. I am surprised that it would get back to 9550 power consumption. What is the reason for this? Which configuration of the dell 14 premium are you using for this though? If it's the one with a 4050, it uses a 3200x2000 screen OLED screen so isn't that screen going to use a lot of battery? Can you ever turn off the OLED like how turn off the 4050 graphics card or you can't do that? There is one with the ultra 5 processor but it's 16gb ram only and intel arc graphics processor but does have the 1920x1200 display. Are you talking about that laptop? I thought that is strange if you are talking about the one with the intel ultra 755h processor, it would get more battery with the powerbank since it has the OLED screen but that isn't true?
On the Dell charger: because its' only outputting 65W, laptop might run at a lower power profile and it'll take longer to give 18k MAH at 65W vs at 100W.
On the other laptop, it's 9550 power consumption because it uses the lower powered processor... which now provides similar performance to the 12700H because of architecture improvements. You can compare power consumption here: https://www.notebookche
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I know that when I connect it to my xps laptop when my laptop battery is 100%, it seems to keep my laptop fully charged at 100% and it last 1 hour 5 minutes or so before it is done. Is that normal? <br />
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Do you actually get more battery out of this for your laptop if you connect this to your laptop the moment your laptop doesn't have any outlet to connect it to compared to when the battery is at 50% or 20%? I read it uses more power when it's lower since it has to charge the laptop and use more power? But most people use their laptop on battery and once they are low in battery, then they connect this to it right?
P.S. Trying to decide if I want to get it as Christmas presents I like it so much.
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Okay so you always lose some percentage with the voltage conversion. This applies to any powerbank or like jackery power station right? Now does this voltage conversion differ a big percentage if you connect the anker powerbank to laptop while battery is 100% compared to say 20%? When I tested it on laptop when laptop is at 100% and so is anker powerbank, it was about 1 hour 5 minutes. I think when I did this with the laptop battery is 20%, it might been 55 minutes or so. Would that be accurate? So it should not last 1 hour 5 minutes since it will use more power getting the laptop battery percentage higher compared to if laptop battery is 100% and the anker powerbank is being used until it's 0%? Does this mean if you planning to use your laptop for a few hours and you haven no outlet for a few hours, it makes sense to use the anker powerbank connected to your laptop while laptop is at 100% and use it all up to 0% and then use your laptop until your laptop runs out of battery? That would be better than using your laptop to 50% or 20% or even less and then connecting the anker powerbank to it? This is all assuming you are doing something on your laptop while the anker powerbank is connected during this process. When you say it uses less heat and more efficiency so you mean the anker powerbank would go a bit longer while connected to laptop right? <br />
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If that is the case, why do people seem to use their laptop while on battery and only when they are in low in battery, then they connect the anker powerbank to it? I guess it's because they want their anker powerbank still somewhat full for charging their laptop or something or assuming they will get access to an outlet soon or they going to be on their laptop for maybe an hour or so and thus want their anker powerbank to be full later on?
BTW, this link will give you a comparison of the two processors:
https://www.cpu-world.com/Compare...2700H
P.S. Trying to decide if I want to get it as Christmas presents I like it so much.
BTW, this link will give you a comparison of the two processors:
https://www.cpu-world.com/Compare...2700H
On the Dell charger: because its' only outputting 65W, laptop might run at a lower power profile and it'll take longer to give 18k MAH at 65W vs at 100W.
On the other laptop, it's 9550 power consumption because it uses the lower powered processor... which now provides similar performance to the 12700H because of architecture improvements. You can compare power consumption here: https://www.notebookche
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