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Hi, I can clear up some confusion here. I got carried away and it's going to be a long one. Tldr: Steam deck's battery is about half of Anker 737 so your results are perfectly fine.
First thing to keep in mind is that some of these Chinese power bank ratings are grossly exaggerated. They have no shame scamming people. Project Farm in their recent battery bank shoot out found the worst offenders only delivered 28% of their promised capacity.
Second, there's going to be a power loss due to overhead and heat. You're never getting back from the battery exactly how much you put in. People claim about 15-20% loss in energy stored.
Finally, mah rating alone doesn't really tell us how much energy there really is. The best way I can explain is using water as an example. If I take two pipes and fill them both with water. One pipe is twice longer than the other pipe, does it mean that I can fill the short pipe two times with water from the longer pipe? Of course not. Shorter pipe could be 3 times as wide as longer pipe. We not only need to know the length, we need to know the width or diameter of the pipe. Once full dimensions of container are known, we can calculate how many gallons or litters it holds and can compare the two and truly see which one is bigger and by how much. So in this case mah rating is like length of pipe and voltage rating is like width/diameter. We multiply voltage by amps and we get watt-hours or Gallons in my example. A quantifiable amount of energy stored in any battery that lets us compare them irregardless of their voltages.
Another way to think about it is gas cans. If I tell you I have a 5 gallon gas can you have a concrete idea of how much gas it holds. But if I tell you I have a 12" gas can you really have no idea, it could be 3 gallons, it could be 10 gallons. Mah and voltage rating is just dimensions of the battery (container), Watt-hour rating is the actual capacity.
Lithium-ion cells run at 3.6-3.8 volts. Anker rates their power bank at 24000mah at 3.6 volts. 24000 mah is 24 amps. 3.6v x 24amp = 86.4 Wh. According to Project Farm testing, Anker 737 delivered 69Wh or 79% of its claimed capacity. So it's more like a 19000mah. It's not horrible IMO compared to some other brands, it wasn't the most honest power bank on the list, but I think it's still pretty good. The best one on the list did 89% of claimed capacity. Anker may also have the most overhead consumption with that screen.
Steam battery is rated at 5200mah at 7.7v. "Pipe diameter" of steam deck battery is twice as wide as on Anker 737 and will require about 10400mah at 3.6 volts to fill it. Deck's battery is really just two 3.6v 5200mah cells linked together on the inside. 7.7v x 5.2amp = 40Wh capacity. That's almost half of Anker 737 rated capacity. Project Farms claims it has 69Wh capacity so I suspect you will not get another full charge even though your Anker showed 50% left, probably a 3/4 charge left.
Take anker 737, chop it in half with an axe, that's literally how much battery is stuffed into LCD SD. OLED SD is even better at 50Wh.
EDIT: Forgot to say, all these companies should really advertise Wh instead of mah on their power banks, but you know, 86 is just not as big or cool of a number as 24000!!!.
I own 3 of these, and I can say annecdotally from my own experience, that these have been pretty amazing. The first time I purchased it was at $99, and it quickly became the most stolen object in my household. Could never find the damn thing anywhere, everyone abused it, and it's probably journeyed more distance than I ever could in a lifetime, since it was being abducted for all sorts of trips. The biggest benefit is just how fast it can recharge, 1hr+ to full charge, keeping phones and tablets alive throughout the day. It is exceptionally heavy though, as you would expect for it's size, but all things considered, still very portable. I ended up purchasing 2 more, labeled them: house pet, travel pet, for the streets. Do I think it's worth the $99 when I bought them? I think $75 is more fair, maybe $80, have yet to see performance drop in terms of port and capacity, but at $90, i'll be picking up one more to label as: outdoors pet. Thanks OP for the post!
Being a frugal Slickdealer, I've looked around for cheaper Power Banks and happened upon a similar capacity power bank from Move Speed: https://a.co/d/4YmxAqu
I've bought two of them about 6 months apart. First was $50 and included a 100W GaN charger and the second one I just purchased last week was a little over $28. Incredible deal for a 25000mAh 130W Output power bank. Just have to watch the product as the price fluctuates often to catch a deal.
In any case, it's worked great every time I use it. I don't have any devices that take 130W over USB-C but have confirmed it at least does 100W. It's only 1" thick and is 5 ounces lighter than this Anker. Not as much tech info on the display though, although I just need to know the watt draw and power remaining.
Anker, of course, is a trusted name. Worth the extra $$$ ?? Probably to most. But I like saving money too.
Project Farm on YouTube gave this the highest rating when he was testing power banks. It was significantly more expensive than the others he tested, but he raved about it.
I like his videos especially when it comes to practical use of things but I take issue with his power bank video because he isn't really comparing it to any other power banks in the same class or price point. He is putting it up against a bunch of sub $30 power banks, of course its going to come out on top.
That being said it is certainly a good power bank. Although recently AllThingsOnePlace has done extensive testing and comparisons of the new Anker Prime 27,650mah Power Bank, and it seems like might be the new king. His tests show it performing much better than the Anker 737.
Not just bad reviews, according to amz it is a frequently returned item. Pass on that.
I had to return mine. It looked good on paper. (Yes, it does have a ridiculous 1980s sci-fi movie design.) I charged it up to full. Two days later it was flat. It lost all the charge.
just ordered the MOVE SPEED for $30.98, thanks. worth a shot at that price.
another option is this POWERΛDD PRO Power Bank 50000mAh PD 65W USB C Portable Charger. I got it for $50 in Dec and it's been working great so far, but it's big. Right now it's $60
I don't have this model, but rather the 27,650mAh/250W one and am extremely impressed. It adds a magnetic dock connector on the bottom and I purchased a dock for it which also functions as a charging station. It's so nice to be able to just throw it on the dock and find it there, always charged.
I had to return mine. It looked good on paper. (Yes, it does have a ridiculous 1980s sci-fi movie design.) I charged it up to full. Two days later it was flat. It lost all the charge.
Seems to be very hit or miss, I wouldn't bother taking the chance. Even at $30. Rather just get the Anker. Their stuff is always great
I had this 7 months ago and it stopped working after 6 months. It stopped charging. It will show numbers, starts to charge then resets. It will keep doing this infinitely and will not charge the battery.
But I have to admit, it was really good when it was working. Now it is an expensive paper weight.
EDIT: It says on the listing there's 3 yrs warranty. I contacted the seller and see what happens next.
Last edited by kherbinoskie March 14, 2024 at 01:15 PM.
Purchased this during the previous sale on Slickdeals. I'm constantly being bugged by my buddies to use it since they always need a charge. This device is able to power my MacBook Pro and fast charge my Apple Watch, iPhone and headphones.
Quite insane how quickly this can fully charge when you use a 100W charger with it in less than a hour or so. Incredibly useful when you need to power multiple devices without worrying about power outlets everywhere and you're always out in the field.
Main complaint is how easily the LCD display scratches and there's a counter on how many times the screen has been used. Makes me hesitant to turn on the display to see the charging stats - which is incredibly useful information for nerds.
Purchased this on Nov 20, 2023 for $79.99. Has been rock solid in that short timeframe.
I purchased it then also. It is worth $79.99, probably not much more. It's shape and weight take a little bit to get used to. Make sure you have a super fast wall charger to charge this brick.
I had this 7 months ago and it stopped working after 6 months. It stopped charging. It will show numbers, starts to charge then resets. It will keep doing this infinitely and will not charge the battery.
But I have to admit, it was really good when it was working. Now it is an expensive paper weight.
EDIT: It says on the listing there's 3 yrs warranty. I contacted the seller and see what happens next.
I've read enough comments now and canceled my order. I instead went with the AnkerDirect price of $80.
If the warranty claim doesn't pan out, harvest the batteries, they're likely still good and only the electronics have failed.
Being a frugal Slickdealer, I've looked around for cheaper Power Banks and happened upon a similar capacity power bank from Move Speed: https://a.co/d/4YmxAqu
I've bought two of them about 6 months apart. First was $50 and included a 100W GaN charger and the second one I just purchased last week was a little over $28. Incredible deal for a 25000mAh 130W Output power bank. Just have to watch the product as the price fluctuates often to catch a deal.
In any case, it's worked great every time I use it. I don't have any devices that take 130W over USB-C but have confirmed it at least does 100W. It's only 1" thick and is 5 ounces lighter than this Anker. Not as much tech info on the display though, although I just need to know the watt draw and power remaining.
Anker, of course, is a trusted name. Worth the extra $$$ ?? Probably to most. But I like saving money too.
At least one review mentions it frying their laptop. That's not really something I'm willing to risk...
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First thing to keep in mind is that some of these Chinese power bank ratings are grossly exaggerated. They have no shame scamming people. Project Farm in their recent battery bank shoot out found the worst offenders only delivered 28% of their promised capacity.
Second, there's going to be a power loss due to overhead and heat. You're never getting back from the battery exactly how much you put in. People claim about 15-20% loss in energy stored.
Finally, mah rating alone doesn't really tell us how much energy there really is. The best way I can explain is using water as an example. If I take two pipes and fill them both with water. One pipe is twice longer than the other pipe, does it mean that I can fill the short pipe two times with water from the longer pipe? Of course not. Shorter pipe could be 3 times as wide as longer pipe. We not only need to know the length, we need to know the width or diameter of the pipe. Once full dimensions of container are known, we can calculate how many gallons or litters it holds and can compare the two and truly see which one is bigger and by how much. So in this case mah rating is like length of pipe and voltage rating is like width/diameter. We multiply voltage by amps and we get watt-hours or Gallons in my example. A quantifiable amount of energy stored in any battery that lets us compare them irregardless of their voltages.
Another way to think about it is gas cans. If I tell you I have a 5 gallon gas can you have a concrete idea of how much gas it holds. But if I tell you I have a 12" gas can you really have no idea, it could be 3 gallons, it could be 10 gallons. Mah and voltage rating is just dimensions of the battery (container), Watt-hour rating is the actual capacity.
Lithium-ion cells run at 3.6-3.8 volts. Anker rates their power bank at 24000mah at 3.6 volts. 24000 mah is 24 amps. 3.6v x 24amp = 86.4 Wh. According to Project Farm testing, Anker 737 delivered 69Wh or 79% of its claimed capacity. So it's more like a 19000mah. It's not horrible IMO compared to some other brands, it wasn't the most honest power bank on the list, but I think it's still pretty good. The best one on the list did 89% of claimed capacity. Anker may also have the most overhead consumption with that screen.
Steam battery is rated at 5200mah at 7.7v. "Pipe diameter" of steam deck battery is twice as wide as on Anker 737 and will require about 10400mah at 3.6 volts to fill it. Deck's battery is really just two 3.6v 5200mah cells linked together on the inside. 7.7v x 5.2amp = 40Wh capacity. That's almost half of Anker 737 rated capacity. Project Farms claims it has 69Wh capacity so I suspect you will not get another full charge even though your Anker showed 50% left, probably a 3/4 charge left.
Take anker 737, chop it in half with an axe, that's literally how much battery is stuffed into LCD SD. OLED SD is even better at 50Wh.
PF Video: https://youtu.be/G1sjqaRll2s
Ok, I'll see myself out
EDIT: Forgot to say, all these companies should really advertise Wh instead of mah on their power banks, but you know, 86 is just not as big or cool of a number as 24000!!!.
I've bought two of them about 6 months apart. First was $50 and included a 100W GaN charger and the second one I just purchased last week was a little over $28. Incredible deal for a 25000mAh 130W Output power bank. Just have to watch the product as the price fluctuates often to catch a deal.
In any case, it's worked great every time I use it. I don't have any devices that take 130W over USB-C but have confirmed it at least does 100W. It's only 1" thick and is 5 ounces lighter than this Anker. Not as much tech info on the display though, although I just need to know the watt draw and power remaining.
Anker, of course, is a trusted name. Worth the extra $$$ ?? Probably to most. But I like saving money too.
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That being said it is certainly a good power bank. Although recently AllThingsOnePlace has done extensive testing and comparisons of the new Anker Prime 27,650mah Power Bank, and it seems like might be the new king. His tests show it performing much better than the Anker 737.
another option is this POWERΛDD PRO Power Bank 50000mAh PD 65W USB C Portable Charger. I got it for $50 in Dec and it's been working great so far, but it's big. Right now it's $60
https://www.amazon.com/gp/product...UTF8&
https://www.amazon.com/gp/aw/d/B0...VXLJ&psc=1
https://www.amazon.com/gp/aw/d/B0...VXLJ&psc=1
Uh, you aren't putting that one in your everyday backpack or laptop bag, that's for sure. Totally different market
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This is not SD anymore... it is spamming.
https://www.amazon.com/dp/B0C2ZB2BNB
I had this 7 months ago and it stopped working after 6 months. It stopped charging. It will show numbers, starts to charge then resets. It will keep doing this infinitely and will not charge the battery.
But I have to admit, it was really good when it was working. Now it is an expensive paper weight.
EDIT: It says on the listing there's 3 yrs warranty. I contacted the seller and see what happens next.
Quite insane how quickly this can fully charge when you use a 100W charger with it in less than a hour or so. Incredibly useful when you need to power multiple devices without worrying about power outlets everywhere and you're always out in the field.
Main complaint is how easily the LCD display scratches and there's a counter on how many times the screen has been used. Makes me hesitant to turn on the display to see the charging stats - which is incredibly useful information for nerds.
But I have to admit, it was really good when it was working. Now it is an expensive paper weight.
EDIT: It says on the listing there's 3 yrs warranty. I contacted the seller and see what happens next.
If the warranty claim doesn't pan out, harvest the batteries, they're likely still good and only the electronics have failed.
I have flown with this thing three or four times by now... Mostly international... No issues.
I've bought two of them about 6 months apart. First was $50 and included a 100W GaN charger and the second one I just purchased last week was a little over $28. Incredible deal for a 25000mAh 130W Output power bank. Just have to watch the product as the price fluctuates often to catch a deal.
In any case, it's worked great every time I use it. I don't have any devices that take 130W over USB-C but have confirmed it at least does 100W. It's only 1" thick and is 5 ounces lighter than this Anker. Not as much tech info on the display though, although I just need to know the watt draw and power remaining.
Anker, of course, is a trusted name. Worth the extra $$$ ?? Probably to most. But I like saving money too.
Sign up for a Slickdeals account to remove this ad.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!