Where or how are you getting the 4.2V charger? Do you mean you will separately charge the 2600/2800 cells with the 4.2V charger before swapping out the notebook cells?

one of the best looking powerbank that I have seen out there. Sadly, 1720mAh. 

Good looking =/= Functional

Any idea how's KingMax's power bank? Normally is it only 85% delivered as promised cos this thing claimed to have 8,000 mAh but I doubt that. I prefer all kind of slim version power bank.

x-treme ,

Normally for a rated 12,000mAH powerbank, how many times can charge a iphone 5 from 20% discharge point?

I got a Pineng 913 look-alike from MV PC fair last mth from this supplier http://metakey.com.my/os_view_full.php?id=651  This powerbank only gave me 4 times full charge on my iphone 5 from 20% level    and from your calculation, it suppose to give me atleast 5 times?

I suspect just a rebranded Pineng 10,000 mAH but claimed 12,000mAH   

I open up the cover and the so called genuine Samsung 3000mAHX4 batteries that they claimed are without Samsung logo and even without any MaH rating   

Well, I'm expecting similar specs to Pineng 913 since the look is exactly the same except diff brand name. The supplier told me made in M'sia using genuine Samsung batteries.. the PC fair stall also displaying Samusng batteries kaw-kaw + free one 3000mAH battery (eh..more like 2600Mah)

This is the inner look of the powerbank taken moment ago:



I hope TS, can open his Pineng 913 and compare with this so called..M'sian maded using genuine samsung batteries   

i hope i can open too. but all units are sold out.
i had opened 1 unit of pn912, the circuit is almost same like pn-910 unit.
the battery colour is different a bit.

PART 3: Lithium-ion / polymer （not 18650 battery，18650 is similar to AA type of cylindrical battery）

Borrowed another powerbank from my friend， it say it is using Li-Po ，smaller and thinner size.（diameter of 18650 battery is 18mm，this one is less than 18mm thickness）
The rated capacity is 5000mAh，everyone can guess how much is the real capacity?


Battery inside is thin, but is it soft one, if you press it, it will not restore back to the original position.


The voltage regulation is not good as PINENG powerbank, it fluctuate much more.
Some of the data taken:
4.77V 0.92A
4.80V 0.93A
4.64V 0.89A
4.48V 0.86A
4.37V 0.84A

From my calculation, the real capacity is only1.82W
Rated capacity 3.7Vx5000=18.5W only9.84% is the real one.
this powerbank had been used for 1 year plus, now only remain 9.84%，1.82W even can't charge iphone for half time.

For your information
Even though there aren't sand inside the powerbank, it doesn't mean it has real capacity.
For example: I opened a powerbank, inside contain 4 pcs of 18650 battery, if I said each 18650 battery has capacity of 10000mAh, 4x10000= 40000mAh. This can charge note 2 more than 10 times. Will you believe it?    Don't laugh, there are people will believe this.
Remember the highest capacity of 18650 battery is 3100mAh，manufactured by Panasonic. Those who said it has 5000 or 10000mAh are cheating.[/size][/backcolor]
If the powerbank is not using 18650 battery, but is Li-Po type, the price is much higher than 18650 type. Li-Po is extra thin and slim. Manufacture price also higher. Those who sell at cheap price, you know la 

Another sharing
Anyone can guess what is this ?

It is battery but not AA type，is 18650 battery，it is used in our laptop battery, this is called 6-cell type.
This battery I disassembly from Lenovo laptop, rated capacity is 48Wh, each 18650 battery contain 8Wh, or 2162 mAh.

Everyone can see that even laptop also use 18650 battery, don't think that this type of battery not good, it is cheaper than Li-Po type.

x-treme Good job.. keep it up!!

Long time never see post as informative as this.