I have one of those power bricks claiming to be 50,000mah. I knew it would be a fake rating before buying from alibaba but at the price I was willing to take my chances.

I've has it for 6 months now and use it very frequent, seems to be going strong. It takes a full day sometimes longer to fully charge. It looks like that white one with the sandbags but black.

It can charge my smartphone S3 and S4 from empty to 100% around 4 times each phone, and can charge my iPad 2 from empty to full 1.5x. Charges my nexus 7 twice. So in theory is good for phones better than tablets.

It is a brick and im happy I got it for like us$20.

Im after a new smaller one to use alternately. Yoobau is too expensive unless it can truely deliver similar results to my brick otherwise better? Plus I don't know which store to trust is lowyat which sells genuine.
I don't know if mine has sand in it, I doubt though.

REMAX POWER BANK 5000 MAH

RM 29 only

more info:

http://smartquay.com/product/remax-power-bank-5000-mah/

or

https://www.facebook.com/smartquaytech

Call 012.446.4494 or 017.670.8780. available in Penang n KL

Hi bro, some powerbank claimed it is able to start a car.
Have you tested the output at 12v? Whether it can generate up to 40 amps @ 12v?
Very curious to know this
Btw,    your work 

so which's band power bank is value to buy?

I have one of those power bricks claiming to be 50,000mah. I knew it would be a fake rating before buying from alibaba but at the price I was willing to take my chances.

I've has it for 6 months now and use it very frequent, seems to be going strong. It takes a full day sometimes longer to fully charge. It looks like that white one with the sandbags but black.

It can charge my smartphone S3 and S4 from empty to 100% around 4 times each phone, and can charge my iPad 2 from empty to full 1.5x. Charges my nexus 7 twice. So in theory is good for phones better than tablets.

It is a brick and im happy I got it for like us$20.

Im after a new smaller one to use alternately. Yoobau is too expensive unless it can truely deliver similar results to my brick otherwise better? Plus I don't know which store to trust is lowyat which sells genuine.
I don't know if mine has sand in it, I doubt though.

contemplating between a few powerbanks,

xiaomi 10400 - cheap and not bulky despite the capacity, but not sure on reliability as quite new to the market?

Enerpad 9000mAh - almost double of xiaomi yet lower capacity, but a very reputable brand in the battery market, plus its pretty small and not bulky

Yoobao 6016 - high capacity but looks a little bulkier than the other 2 options.

can anyone advice?

how to know pineng 929 power bank is fake or real ?

mine is 30000mAh, and it says 500cycles only. WHich I think it is very less..

so what is the best choice for powerbank which is compact and have high storage of battery life?

For now, i think is xiaomi powerbank.
Just grabbed a unit last week, i will carry out the test as soon as possible.

is there any break in operation i.e need to discharge and recharge several rounds than only the cells can be optimize.

Need some advice. I wanted to replace my IBM T40 laptop battery and it's using 18650 battery...

https://forum.lowyat.net/index.php?showtopic=3227157&hl=

Is this battery reliable, will explode or anything? LoL

Nope. Just use it as per normal. But remember to charge the powerbank when battery level is emtpy.

As i know the highest capacity for 18650 battery is 3400mAh, manufactured by Panasonic.

I don't think other brand having higher capacity than that. 

Hmm okay...

And 1 more question. Recently I bought a Probox powerbank 7800mAH (1 month ago)... It stated 780mAH, but when I charge my phone I only able to get 2 complete charges for my Note 2 which is 3100 x 2 = 6200mAH only. Is it something wrong or what? But yeah, I admit it charge much for faster (2 hours 13%-100%) than my stock Samsung 2A charger... (which take around 2.5 hours)

4 June 2014, done updated with Xiaomi powerbank test.

Did you open it up to see what's inside?