Means that doesnt necessarily means original yoobao is better power bank??

as long it is original, brand didn't make much different.

for example, yoobao 11200mAh and pineng 11200mAh. Do you think yoobao will give higher capacity than pineng 1 ? actual capacity only different in few % only.

nice.

so if you were to buy one which will you suggest?

PN910. high capacity at affordable price.

how is it less quality than yoobao.

yoobao is pretty good too right.

btw, why all the powerbanks that i've seen is all china brand.
no apple, ang moh brands

not the problem for the 18650
it just the grade of the battery problem,
normally have grade A,B,C

those china made powerbank mostly Grade B to C
because it was very cheap and those Grade A mostly reserve for own use
they not sell much outside

and also 18650 is 3.7V convert to 5V, your calculation is good!
count with watts, because i buy a powerbank at japan, panasonic 8800mah, it mentioned 3.7V 8800mah at the back
it does charges a iphone 4 and galaxy s2 to from 20% to full, and still haven't finish

that one i can't comment much. how you want to measure the built-in quality?
but for battery it is using the real capacity.
those not made in china one, you know the price.
with the same spec it can double the price.

i don't know how to differentiate those grade A B C.
of course if you buy the better cell, it will last longer, and it will cost more.
nowadays many powerbank in the market are with fake capacity. for example 30000mAh
how can a 6cell / 8cell powerbank equip with 30000mAh?

off topic abit

so now i know where my e-cig 18650 battery come from.. haha

currently using this battery

you cant differentiate it with it outlook, mostly we just can differentiate
with the price, good thing not come with a low price, the grade C, i see a report that days, it just about 40% of it stated mah, which grade A is about 95%+- Grade A battery is used by samsung, panasonic sanyo those big company, while Grade B and C we can normally buy at the market

I have disassemble an yoobao 6600mah type, 3 Red color battery, and it stick with the glue stick glue, i haven't pull it out,
i planing buy at least 6 18650 to install and use it

at taobao.com china website, their have some panasonic brand 18650,
i will buy some for testing

wow, it was a samsung!

dafuq?

ecigs using samsung rechargable batt?
hahaha

ICR 18650 = lithium cobalt oxide (traditional) cylindrical cell
IMR 18650 = lithium manganese oxide cylindrical cell
IFR 18650 = lithium iron phosphate cylindrical cell

found this,
however..........
not really know what is this

double post is double post!

This post has been edited by foohoa: May 24 2013, 12:07 AM

so had you tested for the real capacity for the yoobao 6600mAh and the efficiency ?
how about the grade B ? 80% ?

now i very hard to believe those.
many things have imitation.

grade b between 60 to 80% only.....
and my yoobao die in few month, that i brought from china
they actually show me 2 type packing, at the outlook was same

1 with yoobao logo, 1 without, and the different is RMB20 only....
b4 this, it manage to charge an galaxy s2 and it about to die

planing buy this

http://item.taobao.com/item.htm?spm=a230r....&id=13485304566

my fren is agent of taobao, they allow me buy anything!

so...
want bulk?

haha. so did you buy the original yoobao ?
now you are going to replace the battery by yourself ?
by the way my gf is taobao agent too. i can buy anything from taobao, can ask them how to pack also.
there are something powerbank, which can replace battery by your own. i am planning to get one to test.

yes...
i buy the ori, but...
i search online, acutally china ppl hate yoobao
i planing to take out the board, and build a battery case, store at least 6 battery,
look might be ugly, but i must be better then any power bank at the market

about these you can refer to batteryuniversity for more information.