first is the led indicator. there are only 3 leds. when charging phone, it will blinking from one to another, like flowing. but we don't know how much charge inside this powerbank. it doesn't show the level of the remaining capacity except u disconnect it from charging your phone. 3 leds doesn't enough to accurately show the capacity.

second is the charging voltage. inside there are regulator and ICs to control the charging limit. but it is fixed to 4.2V only. that means some other battery such as 3400mAh can't charge fully, which required 4.35V to charge fully.

and i think the efficiency is not good also. my 2800mAh battery perform less than expected. 18650s can get from taobao. some battery charging voltage limit are 4.2V and some are 4.35V.

i bought http://www.ebay.com.my/itm/190927360800?ss...984.m1439.l2649  and http://www.ebay.com.my/itm/380727828090?ss...984.m1439.l2649  . Is this combination (RM7 + RM33 ) stated above  is better than those bulky powerbanks 20000 mah RM 60 . LOL just to save some $$ and less weight powerbank.

I have a 30,000 MaH that isn't in use and would like to know it's true capacity. Was wondering if you could do a test for me?

sure ?
Because the seller told me 2800mAh and 3400mAh required 4.35V to fully charge it.
They have custom made charge to charge the battery until 4.35V.
They had tested and sold to customers.
I will personally test it if i have the chance to grab a 4.35V charger.

I think what you want to show is this right?

found an interesting listing in Lelong

http://www.lelong.com.my/hot-selling-muoge...7-01-Sale-I.htm

the cover and outside case looks exactly like Pineng's but they are not using 18650 batteries.

they allegedly use superior Korean li-po cells.

brand is MUOGE, but I can't find any legit links to this brand in google search.

hmm 

yeap, it impossible. just sharing to warn people.

30k/2.6k is 11.++. the enclosure would need to be twice as long or thicker to accomodate those cells.

i bought a PN910 from a friend who went to china for a short trip. ordered straight from their website, and s/n checked alright. but haven't collected the powerbank from him.

interesting info in your thread. esp with regards to the grade of cells used in Pineng's powerbank.

are you using the exact enclosure and circuit boards with only the battery cells changed?

in pineng website, they say that the in input is 5v/2a, but yours is 1a max. so actually, even the Pineng units accept 1A max only?

but then again, higher A may lead to faster deterioration of the cells.

edit:

also, i found an interesting link of testing done on different brands of 18650 cells

http://lygte-info.dk/review/batteries2012/...mmary%20UK.html

My Experience
After much looking around and consideration I acquired a Probox 5200 mAh.  It runs fine. They claim to use Sanyo cells which has a reputation. After being in use for a few months I think that they are good. Prices are relatively higher but sadly they are not being restock.
Just bought another, the bigger 7800mAh. Hope it is as good as the first. Been on shop shelves a while and unlike Romoss they dont come pre-charged so have to do full charge of 8 hours.  Keeping fingers crossed but from my experience of my first purchase I think it will proved to be OK.
I do notice there is another brand that also quite good.  Enerpad.

Them more decent brands that I am aware of:-
1.  Probox - use Sanyo cells, premium look, so so build
2.  Eneloop - Own Sanyo branded powerbank, supplied with charger
3.  Enerpad
4.  Romoss  - Utilise Samsung, SDI for the premium model, great build
5.  Gigabyte also uses Japan cells, not sure what brand tho

yes the cheapest is Enerpad. They say Enerpad is the best for value for money.

I do hope some of forummers can post long term reviews of various models of powerbanks that we see many people use to give us a rough guide as to which are good buy and which are trash....
A decent powerbank can extend some of our mobile devices so that they can yields more months of services and delays purchase for upgrades while waiting for the right stuff to be released.

Why not go DIY? From all of the decent brands mentioned above does come with quite premium priced no? Say find some decent powerbank case online and coupled it with a protected type of 18650 battery e.g: Keeppower, Panasonic or Samsung SDI or Sanyo,  there ya go... But of course price might be slightly cheaper or higher depends on selections, requirements (mAH ratings for battery, protected or non-protected type, brands etc..). Also if you are not those type who are adventurous into D.I.Y, might just go ahead for available brands in the market. Just an opinion...

IINM, battery cells degrade even when you don't use it. So might want to avoid older brands or models. as far as i know, Sanyo has been bought over by Panasonic. and the famous 5200 mAh booster that Sanyo used to sell is being rebranded as Panasonic's, with wireless charging too. so try to get the newer batches from Panasonic instead of getting the old Sanyo mobile booster. I still see the AA and AAA eneloop NiMh being sold, i am not sure whether panasonic is killing off that brand or maintain the brand as it is already quite famous.
True. and to be honest, the prices of these powerbanks that are mostly made in china is very cheap there. Problem is, even the fake ones looks exactly the same if you were to put it next to the original ones. it is much safer if you were to order from their official online store. normally listed in their official website. eg are Pineng etc. and these are normally quite recent batches, since they are straight from manufacturer, unless you choose the older models.

of course these china brands, the quality won't be A grade like Samsung Panasonic etc. but they should be adequate for average use for 2 years etc.

like w00t said, DIY is a good route too, since you can roughly test the age of the cells. but if that is too cumbersome, there are traders like AllnGap that sells his DIY powerbanks that use A grade cells by Samsung. and the price is fair in my opinion. reputable china brands powerbank are sold at similar price in malaysia.

personally, i am using Pineng's one, bought by a friend from China, straight from their official online store. it has been a few months and it still hold good capacity.
and of course, general rule is the true capacity is roughly 0.7 of the rated capacity. which for my 11200 mAh Pineng is 0.7*11200=7840. and this is true, as it can charge my N4(2100 mAh) roughly almost four times of full charge.

Bought at PC shop at Batu Pahat. RM188 for 12000mAh. Here some picture

No. it not state how many cells inside. Just do some survey for yoobao transformer powerbank. The price slightly less compared to mine. This product can be trust or not?

inside is lipolymer cell .. its said from korea genuine..
but i dunno the quality now is dilemma, want to buy or not..

I just bought it less a week ago.
Very dissapointed.. Can only charge less 3/4 for Galaxy Tab 8.0.. T_T T_T
Note:
Galaxy tab battery 4,600mAh..

yup i also just buy it. very suck money haiz

this 'pisen' is same with 'piseng' ?

if 1A = 1000mA ..

why is power bank rated in mA. ???

why 2200mA .? is it not same as 2.2A. ??

we dont say 1200meters.. .  = 1.2km...

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

I dont know bro.. this was a gift to me by my sister. I just mentioned what it is written on the label.. [attachmentid=3929617]

No bro.. it is damn thick, too big and heavy till my sister doesn't want it and give it to me. I it like 2.5 - 3x S4 phone thick.. [attachmentid=3929637]

Hi I have bought a power pack and battery separate the battery says it's a ultra fire 6000mah 3.7v  there are also a lot of people selling the exact same brand. Do u think I have been conned