They rather add more cells than to purchase the 3400mAh cells. For example the YB-655 rated at 15600mAh means each cell is 2600mAh, but if you use 5x3400mAh you can achieve a higher capacity plus a smaller power bank but it's just not economical for them I guess.

Or either could you pass me a few pieces of your resistor and maybe your DMM so I could test it myself and post the results here as well? Your DMM comes with logging features?

And if you're talking about people who use unprotected cells, for eciggs once the battery reach a certain voltage the flavour and smoke amount will be different so that's a sign that the capacity is running low. Similar for a flashlight, once the battery reaches a certain voltage the light output will lower down showing the battery's almost up. Usually when this happens the battery should still be above 3.0v but unless the user is completely ignorant then yes he can run the battery down way past 2.7v and maybe even down to zero. By then the battery had been permanently damaged and had to be disposed of. That's why users who handle unprotected li-ion cells should be educated on it's characteristics and charging/discharging methods.

If anyone of you are looking for high quality power bank, feel free to visit my thread. Satisfaction guaranteed. Check out the feedback about it.

i opened up my fake yoobao 11200mah powerbank.
inside only got 4x2200mah 3.7v batteries. 

how do you know it is 2200mAh?

i see. may be the actual capacity will be lower than that. 

i also opened my original Yoobao before, found 4x 2500mAh cells instead

weird thing is it's confirmed an original.

ya, maybe its low quality cell. i dont 'feel' that it lasts as long as it should.
8800mah@3.7v should be around 6512@5v. after 87% eff, its around 5665.
should be able to fully charge my phone (2100mah) around 2.7 times.
i only use to charge phone at night with airplane mode on, i can only use for 2 nights. after that, the powerbank is flat.

swapped with fake unit?

nope it was an ori. confirmed original from the SN and also matches all 'original' markings found online

How to prevent the powerbank from frying your phone motherboard?

Do we need to check the output capacity of the power bank?

I had bad experience with the Yoobao 11200 mAh powerbank.  I have to send my Samsung Galaxy Note for replacement of motherboard after charging overnight  with it and later when I had the same experience with Nokia Lumia 900.

The Yoobao was original cost I had send it for repair earlier at the serveice center in Jalan Segambut.

Any advice would be most appreciated.

are you sure with only charging with powerbank will fry your phone motherboard? how about normal ac charger?

there is a built in circuit to limit the current on phone motherboard. i had tried using 5V 3A charger to change my phone. when i measure, it only accept the current upto 1.1-1.2A and not 3A.

there are also built in circuit for powerbank itself, that's why it will have 2 output : 1A and 2.1A.
the rating is showing the max current that it allow, not must be exactly 1A.

so far i tried my times for overnight charging no problem on my phone. i like the feature that it will auto cut off when my phone is fully charged.

do yoobao have auto cut off feature?

Based on my estimation, PN-912 16800mAh will have 6 drycell?
1 cell=2800mAh
Am I right?

are you sure with only charging with powerbank will fry your phone motherboard? how about normal ac charger?

there is a built in circuit to limit the current on phone motherboard. i had tried using 5V 3A charger to change my phone. when i measure, it only accept the current upto 1.1-1.2A and not 3A.

there are also built in circuit for powerbank itself, that's why it will have 2 output : 1A and 2.1A.
the rating is showing the max current that it allow, not must be exactly 1A.

so far i tried my times for overnight charging no problem on my phone. i like the feature that it will auto cut off when my phone is fully charged.