Author Topic: 690000 mAh Power Bank 4 USB Fast Charger  (Read 2433 times)

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Online innkeeper

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690000 mAh Power Bank 4 USB Fast Charger
« on: October 28, 2018, 08:17:30 pm »
I CALL BULLSHIT!

there seems to be a plethora of these power banks on wish.com with claims if extremely high capacity.
most popular capacity currently is 690,000 mah .. that's 690 amp hours for those playing at home.
There are even some with higher claims...



https://www.wish.com/search/power%20bank/product/5b31ea4cc6025e370a7c6e28?&source=search
Hobbyist and a retired engineer and possibly a test equipment addict, though, searching for the equipment to test for that.
 

Offline MrMobodies

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #1 on: October 29, 2018, 09:08:19 am »
I don't like power banks that got big displays but no voltage displayed.
 

Offline sstepane

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #2 on: October 29, 2018, 09:17:18 am »
Just type in google - "bailong 18650" and you'll get more proof =)
 

Offline kjr18

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #3 on: October 29, 2018, 09:29:27 am »
Just type in google - "bailong 18650" and you'll get more proof =)

Wow, just searched it, and I found a local supplier that sells these for a bargain price: only 260 bucks for one! :palm:
 

Offline amyk

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #4 on: October 29, 2018, 12:04:06 pm »
A real 690Ah power bank would take roughly two weeks to charge over a 2A USB connection...
 

Offline CCitizenTO

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #5 on: October 30, 2018, 03:27:30 pm »
LOL.... It's a case of if it's too good to be true it probably is.

At those ratings in Ah they'd have more energy capacity than the batteries in the pallet jacks and forklifts we have at work and I can tell you those batteries DO NOT fit into the palm of your hand.  :-DD
 

Offline palpurul

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #6 on: October 30, 2018, 03:40:42 pm »
Finally a power bank for my electric car. :-DD
 

Offline matseng

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #7 on: October 30, 2018, 04:44:29 pm »
Well, they don't specify the voltage, so it could be specced at 690 000 mAh at 10mV or so. Then it would be a  reasonable amount of power in it. ;-) 

But in general I find it kinda annoying that the mAh-value of power banks issnt specified for the real output voltage of 5 volts but rather calculated at the 3.7 volts of the lipo. As a consumer I really don't care the batteries or technology inside the power bank, but just what I actually get and can use at the output.
 

Online innkeeper

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #8 on: November 03, 2018, 01:11:52 am »
but it says quick charge  :-//
Hobbyist and a retired engineer and possibly a test equipment addict, though, searching for the equipment to test for that.
 

Offline kjr18

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #9 on: November 03, 2018, 09:37:52 am »
Well it means that it charges quickly  :-DD
 

Offline JackJones

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #10 on: November 03, 2018, 09:55:24 am »
Most people don't have any idea what a mAh is. All they see is bigger number = better. Those that know 690 Ah power bank isn't real aren't probably going to buy it. So it's not like there is a huge downside for the seller for lying like this. Some people might go through the effort of testing their real capacity and get their money back. But overall I doubt it really matters to the sellers.
 

Offline Red Squirrel

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #11 on: November 04, 2018, 06:53:30 pm »
I'll get a couple and put them in series and run my house off them.  >:D  And since it's a fast charger, I should be able to charge them up with a Canadian Tire solar panel on my roof in an hour or two.  Good to go!
 

Online Gregg

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #12 on: November 04, 2018, 09:50:18 pm »
Some marketing expert thought that micro meant 1000 milli- and when engineering offered cheap 690 microamp hour they translated it to 690000 milliamp hour and put in for a bonus.   :-DD
No wonder it charges fast! :palm:
 

Offline MrMobodies

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Re: 690000 mAh Power Bank 4 USB Fast Charger
« Reply #13 on: November 09, 2018, 06:32:31 pm »
I know some of them are in series and they add all the amps up and I see that in the supermarkets.
They state it in mAh and make the fonts big.

It reminds me on Ebay some some time go when you get those sellers who say "with 6GHz processor bundle" when that they mean a 3GHz Duo core.

I have actually got a power bank that imported two years ago and I'll post a thread and some pictures on it.
It is dodgy so I'll post in this category but it has some features on it like a DC out and you can change voltages in 0.1 increments and change the batteries.
It is not accurate and in some Russian boards they stated that issue with it.
I couldn't find any other that could do that back then.
 


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