Xiaomi Power Bank as E-Skate Battery Pack?

Hi,

Iv'e noticed you can get this 10,000mAh (5V) power banks pretty cheap:
http://www.banggood.com/Original-XIAOMI-5_1V-2_1A-10000mAh-Power-Bank-For-Smartphone-p-977406.html?utmid=57
(Will be 11.99$ in a promotion next week).

Why not get a bunch of them (They also weigh only ~200gr a pack) and use them to power our boards?

EDIT: I believe there are 4 batteries like these inside:
http://www.dx.com/p/lg-lgabb41865-18650-2600mah-rechargeable-battery-grey-317674#.VeTgIFWqqko

Doubtful this will work well...

It only powers items at a couple amps - so trying to utilize in series (to move from 5v which is likely regulated) to something we'd want like 24v+ would be a lot of work. Better to get some bare 18650 cells that can sustain high Amp output. Then do what others have done and make your own packs.

I've measured a pretty consistent (peak) draw of around 65A on 8s (33v). Just to compare.

Playing with it is one thing, but i really don't think these would work well, or you'd save $ just buying the bare 18650 cells and making your own pack.

GL!

As with what sl33py said, seems like a good idea until you look at the battery's specs on max discharge amperage. You will want to keep that in mind.

I think it's even cheaper than 4 bare LG 18650 (which iv'e seen for 4$+ ech).

Anyway, in the meantime i have found another interesting battery pack to possibly replace my triple 12v 7AH SLAs (always looking for some):
http://www.banggood.com/DC-12V-20000mAh-Super-Rechargeable-Portable-Lithium-ion-Battery-Pack-p-976717.html

Just remember that not all 18650's are the same.

Yes you can save $ and get cheap cells - but will they provide the Amps you need for a board pulling 50+Amps peak? If you solder these up and make your own packs with cheap cells and one dies...

I personally would make sure the cells exceed the draw needed, and get quality cells vs no-name cells. BUT i'm not quite to the "pack building" stage like others here. I'll stick with the known lipo challenges for now.

Let us know how your testing pans out and GL!

I had the same thought bout the Xiaomi packs when i was getting into my first build about 8 months ago. When i looked up the specs of the cells xiaomi uses the amperage output isnt nearly enough for our use even if you did get them cheap.

I thought the new Xiaomi powerbank uses 18650, but i was wrong, the 20,000mah version that cost less than 20$ is made of two 3.7v 10,000mah lipos - returning to the original question, you think we can somehow modify it (while eventually keeping them in their enclosures) so we can daisychain a few of them to create a battery pack for an ebike?