I agree with you. That battery may have 20,000mAh max. but 40,000mAh not at all. I paid my BLOW 50€. Too little money for a battery of "40,000mAh'' And from behind on the battery on the right side where the description, something is shaded so that it cannot be seen.
40 000 Mah 3.7 V = 20-25 000 Mah 5.1, 9 or 12 V Out - its normal. If the circuit of the device is configured to fully discharge the battery, then you may get more at the output, but such a power bank will either fail immediately or will definitely not last long!
@@userua No man. I get your point, but I measured the capacity both ways (in and out) - while charging the bank from 0-100% and discharging it from 100-0% - in order to measure the actual capacity of the cells inside as well as the capacity it is capable of putting out... Obviously since it has to raise the voltage to USB levels when it charges something (or higher for fast charging), the capacity coming out will not match the capacity going in (unless we measure in mWh and take losses into account). But even when charging the internal cells I only measured about 13000mAh. This is nowhere near 40Ah... When measuring the capacity while charging something with it, it gets empty at around 10-11Ah The capacity is exaggerated by a factor of 3-4x and for me, that's a scam...
I had mine for only 6 months before it stopped working... took it back, sincw it was still under warranty, they kept it for a month to "fix it" and then gave me a new one... used it for only 3 days before this one died too... I was only using it to charge my phone.. I'm pissed 😡
This battery bank is a disgrace - the specs are exaggerated by a factor of 4x! I paid good money for it, so I expected it to have a good capacity... The size of the box deceived me a bit. Once it was out, I realized it's not much larger than my old "20000mAh" battery-bank. So I decided to measure how much it can actually output and also the capacity of the batteries inside. I was very disappointed to find that it's even worse than my old "20000mAh" bank. I was able to charge the internal battery cells to around 13000mAh capacity (confirmed with two different measuring devices). Sadly that means that the battery bank will not be able to put out more than around 11000mAh (since it has to raise the voltage to USB levels when charging)... And again that's pretty much what I measured when using it to charge a large tablet battery... My tablet has a battery of 11000mAh (measured and confirmed). It wasn't entirely empty. About 9000mAh was charged into it and the battery bank had 20% left according to it's own LED display. It the specs were correct, this battery bank should be capable of fully charging my tablet almost 4 times. 3 times at least! But it can barely do it once. I thought only Chinese batteries come with fake 4x specs...
That looks way too small for 40ah
Ma rzeczywiste 40 000mAh? Dlaczego analogiczne produkty tych gabarytów uzyskują pojemność 2x mniejszą? Cóż to za technologia ogniw?
Nie ma waga powinna być 700g :D mój 30Ah wazy 630g
It charges my phone like 3 times with a 4000 Mah battery... this is AT MOST 20 000 Mah...
stop selling fake shit.
I agree with you. That battery may have 20,000mAh max. but 40,000mAh not at all. I paid my BLOW 50€. Too little money for a battery of "40,000mAh''
And from behind on the battery on the right side where the description, something is shaded so that it cannot be seen.
40 000 Mah 3.7 V = 20-25 000 Mah 5.1, 9 or 12 V Out - its normal. If the circuit of the device is configured to fully discharge the battery, then you may get more at the output, but such a power bank will either fail immediately or will definitely not last long!
@@userua No man. I get your point, but I measured the capacity both ways (in and out) - while charging the bank from 0-100% and discharging it from 100-0% - in order to measure the actual capacity of the cells inside as well as the capacity it is capable of putting out...
Obviously since it has to raise the voltage to USB levels when it charges something (or higher for fast charging), the capacity coming out will not match the capacity going in (unless we measure in mWh and take losses into account). But even when charging the internal cells I only measured about 13000mAh. This is nowhere near 40Ah... When measuring the capacity while charging something with it, it gets empty at around 10-11Ah The capacity is exaggerated by a factor of 3-4x and for me, that's a scam...
@@MrPajo1991 I guess we BLEW our money away.
@@deezeemb Yes, we are! HAHA.
I have a problem, I used your portable battery and all of a sudden it doesn't want to turn on or charge, please help
same
I had mine for only 6 months before it stopped working... took it back, sincw it was still under warranty, they kept it for a month to "fix it" and then gave me a new one... used it for only 3 days before this one died too... I was only using it to charge my phone.. I'm pissed 😡
This battery bank is a disgrace - the specs are exaggerated by a factor of 4x!
I paid good money for it, so I expected it to have a good capacity... The size of the box deceived me a bit. Once it was out, I realized it's not much larger than my old "20000mAh" battery-bank.
So I decided to measure how much it can actually output and also the capacity of the batteries inside.
I was very disappointed to find that it's even worse than my old "20000mAh" bank.
I was able to charge the internal battery cells to around 13000mAh capacity (confirmed with two different measuring devices).
Sadly that means that the battery bank will not be able to put out more than around 11000mAh (since it has to raise the voltage to USB levels when charging)... And again that's pretty much what I measured when using it to charge a large tablet battery...
My tablet has a battery of 11000mAh (measured and confirmed). It wasn't entirely empty. About 9000mAh was charged into it and the battery bank had 20% left according to it's own LED display.
It the specs were correct, this battery bank should be capable of fully charging my tablet almost 4 times. 3 times at least! But it can barely do it once. I thought only Chinese batteries come with fake 4x specs...
Fake shit it has maybe 15000mah
I wish... It's even less... The internal cells have around 13Ah and when charging something you only get 10-11Ah out.
Hahaha oh boy, recently got a customer e-mail... GIVE ME THE CORRECT PRODUCT or money back.