Chinese 12V 50000mAh battery pack teardown (18650 lithium ion cells)

I needed a 12 volt battery pack for my bicycle LED lights that could run the lights for a couple of hours without charging. So I bought this "50,000mAh" battery pack from AliExpress. Noticing that it was quite lightweight, I thought I'd tear it down to see what was really inside it...

The offending AliExpress store = "Aleaivy battery 2 store":

(hint: it's not really 50Ah!)

[etpay]

If there ever was a war on with China and I was a cruise missile technician, I'd program at least 12 cruise missles to go to these battery factories brah...

[randysagalen]

Planing to buy one of this.after watching your video I change my mind.ty.

[partyzantzwycietegolasu]

I nearly got myself one. Good job man...
Plus... The size of the charger can say a bit.

I received time ago a 90Ah LFP battery that eventually had 12 cells (3 series of 4 parallels). It was not LiFePO4 and of course merely 12Ah.

[garygowanoffgridsolar]

They added one to many zeros on the label just a miner error, very hard to find honest suppliers 🤨

[ufkrc]

On the internet it says the highest mAh 18650 is the Panasonic NCR18650G (3600mAh). So if you use that info and battery knowledge, you can never get 50000 mAh. Regards

[ZEEKUPP]

Should be 12.8 volts when fully charged. There is no way they could have the storage capacity they are rated at.

[syahtech]

Everything you see from China, don't forget to devide by 10

[warXnews]

what happens if we put it on charging and in the same time we link it to load, does the bms will protect it and just discharge or it will be damaged

[adelgc]

Before seeing he video, it is impossible to get 12v 50 000 Mah with this small shape . If we have 12v 50ah we need 50 pcs of 18650 with capacity of 3.0ah .
Pay attention when you buy a lithium ion battery .low price equal to bad quality.

[codebeat]

Actually it is at maximum: (3600*2)/3=2400mah or 2.4ah. I think these are cheap cells of about 600 or 700mah each. That will be a capacity of approx 466 mah.

[jaytea]

Think the sheets are fiberglass. Not so bad.

[MmmHuggles]

If 2500mAh per cell, that would be about 5000mAh. Oopsie add an extra zero for 50000mAh.

[samnicolle]

If you buy its best from ebay because you're safe and you usually get what you're after

[miguelamaya]

Tell us the company selling this batteries

[katiekumcgil]

heya mate actually those so called bms, arnt bms, they dont work the way you think, in fact only high end bms units with separate shunts and relays for charge and discharge protect cells properly

[LA-Creative]

50Ah for that price and weight. How does is feel to be holding world peace in your hands? 😂

[katiekumcgil]

hehehe theres pob like 3 ncells in there or one cell and 50 cent boost module, curious how ill do with the guess

[XSAILOR]

At some stage used aliexpress a lot, now basically never. Not only the shit products, the main reson was the systematic shipment scams the sellers do. And its almost impossible to recover Your money, as the support is on the sellers side.

[perrymickle]

the video would be better if you dropped the patronizing tone. the people watching this vid arent the ones who ripped you off