eBay 9 MILLION mAh power bank teardown (with schematic)

Video Description

Isn't it incredible how much battery technology has advanced. This power bank claims to be rated 9 million mAh and yet it fits in your hand. Eat your heart out Elon. I'd like to correct one of the computations I made on the Kink Palculator. I was a mere three decimal places off, so I regret that a full charge of this power bank will only power your Tesla car for part of a day and not a year. But you can probably fit quite a lot of them in the glove compartment for long trips. It's also apparently twice the capacity of a Tesla Power Wall, but with the advantage of fitting conveniently in your pocket so you can charge it at Starbucks and steal all their power. In reality this is just the evolution of rival Chinese sellers on eBay trying to beat each others inflated figures. Their justification is that you might achieve this total capacity with all the recharges over the life of the product. (You won't.) It's worth adding another warning here. Even if these units do have solar panels, do NOT leave them in direct sunlight as it may overheat them and cause the lithium cell to fail dramatically. Aside from not actually being a 9 million mAh power pack, there was an element of disappointment to find that the real cell size could have been at least twice as big. The lithium cell test came in at just over 9,000,000 mAh at 9,000,005 which is pretty good... No not really. 1st cell charge cycle = 2358mAh 2nd cell charge cycle = 2410mAh The chunk of steel that adds reassuring weight to the unit is 70g (2.5oz). If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators