Inside a chunky USB rechargeable work-light power bank.

Another work light with power bank functionality, but this one has interesting circuitry. It also works very well as a work light, with the run time dependent on your choice of batteries and the intensity setting you use.
A test of the current showed:-
Full = 900mA
Low = 250mA
Flashing = 600mA

Here's a suitable eBay search link to get you started if you want to get one of these:-
https://www.ebay.com/sch/i.html?_from=R40&_nkw=30W+Portable+USB+COB+LED+Flood+Light+Outdoor+Camping+Spot+Work+Lamp+Power+Bank&_sacat=0&LH_BIN=1&_sop=15

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 advertising algorithms allowing it to be a bit more dangerous and naughty.