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Teardown of AliExpress Okoman lithium 18650 battery pack

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I bought a "13800mAh" 12V battery pack from AliExpress. It appeared to have 6 lithium cells of the 18650 type in it.
However I was only getting about 1100mAh out of the pack. So I tore it down...
There's bending the truth, then there is outright fraud. Okoman appear to be doing more of the latter.
Here is the offending product: www.aliexpress.com/item/10050...
And their lovely factory photoshop job: ae03.alicdn.com/kf/H2f3c6a0e0...

Опубликовано:

10 ноя 2021

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Комментарии : 23

@kero-oke9300 2 года назад

I bought from this brand 2 years ago, my battery would drop dead before the voltage gets low. It was $140 for 500wh. A high quality lithium battery can costs double of that. Thank you for the video. I am a Chinese too, it is sad that there are too many scams in China, and it's getting worse, please be aware of that.

@mikaelwester 2 года назад

Don't take it personal. Happens all over the world.

@jonasmeier417 2 года назад

This Okoman put also "Panasonic" on it, which is a lie too. How can they sell and get away with it for years?

@rockrl98 Год назад

That's next level, I thought they just used EOL cells on these ultra cheap ones...

@patrickdeboer1377 2 года назад

I think the name is "O,Conman " ;P

@RuiBentoAlves 2 года назад

Sand??? omg.... So Sad!!! thanks for the video!

@UNLOCKCONNECTIONS 2 года назад

Should post the seller store in your video so others can see and don't buy from them

@MichaelBrooksDr 2 года назад

Done, thanks!

@timhull8664 2 года назад

And by the way, thats magic fairy sand..

@mct8888 Год назад

Were you able to get a refund from AliExpress?

@MichaelBrooksDr Год назад

Not after I ripped it apart! Though this video has cost them way more in lost sales than a refund would have. My experience with AliExpress is that it's sometimes possible to get a refund before the dispute window has closed, but utterly impossible after it has closed. Delivery times usually consume most of the window!

@patprop74 Год назад

That is FING Shady and disgusting.

@XSAILOR65 Год назад

Multiple scam in one sale..... incredible greed

@Ro-Bucks Год назад

I just ordered the differnt brand that loos the same off ali, I got 2x 48V 30Ah and if they test less than 5Ah ill be getting a refund!

@MichaelBrooksDr Год назад

Oh jeez... How much did they charge? I reckon either half of them will be full of sand, or will be low density 700mAh cells. Nevertheless, you can rip out the charge/discharge protection circuit and use it on legitimate capacity cells. I've found that the most reliable source for cells is online vape (e-ciagarette) shops!

@barakcobrama1703 2 года назад

i bought a 999999ah 100ah 48v battery for 120 pounds which is on its way take it some are full of sand.

@MichaelBrooksDr 2 года назад

Probably! You can get a rough idea by looking at the weight. The world's top performing Lithium ion batteries are capable of an energy density of 265 watt-hours/kg. At 48V, that equates to 265/48= 5.52 amp-hours/kg, or 5520mAh/kg. So unless your 100Ah battery weighs at least 100/5.52 = 18kg, then it's a lie.

@timhull8664 2 года назад

Mike use the proper tool for the job..

@MichaelBrooksDr Год назад

I'd run out of spoons :-p

@perrymickle424 Год назад

i got suckered by the cheap price of okoman. i bought 3 of the fuckers (mind my french)

@MichaelBrooksDr Год назад

Look on the bright side, you can start creating your very own beach! (sorry they ripped you off too!)

@bretts7085 Год назад

Good brand 18650 Li-Ion batteries only go up to 3600mAh i have 100s of them, but i only buy Samsung, Sony, Sanyo, Panasonic, LG, These good brands are usually made in Japan & maybe assembled in china. But China can't seem to make a really good Li-Ion battery for some reason, I've tested some of china's ok-ish 18650 batteries that came with something i bought, but the capacity only seems to go up to about 2000mAh & still i think they're crap! & i throw them in the bin.