Really great posts , thanks for sharing .
New knowledge
What high end brand that produce good power bank ?

fake capacity.

check out my link here : see how real testing is done.

https://forum.lowyat.net/index.php?showtopic=2974502&hl=

How much you pay is how much you get.
so if you buy a cheap chapalang brand then you can expect it won't last long,
may have a risk of explosion too.

Now i don't have much time to do the test. Because my test required long time and manually calculate for the result. you may try to count how many times it can charge the phone.

Hi,
It needs about 12 hours to fully charge the powerbank, depending on the charging current.
There are no serial number on the powerbank.

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.

yes, u can check out the datasheet from manufacturer.


sometimes they charge the voltage higher to make more capacity.
lets say u charge at 4.2V will get 2600mAh
charge at 4.3V will get 2700mAh.
sometimes the battery might be out of specs or does not comply fully to manufacturer specs.

the voltage depends on the chemical composition, if the chemical composition are the same, thus voltage will be the same.
all lithium ion and lithium polymer voltages are the same at 4.2V

dunt know who's the idiot which started the 4.35V thing and everyone started to use at that voltage, charging at 4.3V will cause the battery to die prematurely only. wont have fire or burning hazard

if you charge at higher voltage, the battery will die faster, that all

This post has been edited by AllnGap: Nov 4 2013, 11:55 AM

hey guys,can you recommend me a good powerbank under rm100

Buy from reputable joints. As to brands, there are way too many, but good ones at 100 should be from 5000 to 7800 mAh.

I have some questions regarding powerbanks in general, and my Pineng PN-912 in particular.

Is it advisable that the powerbank be almost depleted of its charge, let's say 10% or below of remaining capacity, before it can be recharged? Or can powerbanks be recharged even if there's still say 50% of remaining capacity? What is the best practice for such a device?

I ask because this is my first time dealing with powerbanks, even though I have dealt with various rechargable batteries in the past.

Regarding the Pineng PN-912 powerbank, I tried recharging it, using the adapter that came with it, when it was only at 42% remaining capacity. After an hour and a half of continuous charging, it STILL stayed at 42%, which I find worrisome thus I immediately stopped charging it.

This is where it gets interesting. If I charge my powerbank at 1% capacity, then it displays a constant increase of percentage charge normal for the rate of charge that is provided by the power adapter to the powerbank. After an hour of charging, it showed 5% of remaining capacity -- an increase of 4 from 1% starting capacity.

This is how I have charged the powerbank for several times now, recharging the device when the remaining capacity is 10% or below.

Compared to when I tried charging it at 42% and after an hour and a half was stuck still at 42%, it made me wonder if there is an issue with the device itself, or that there is some logical explanation to this issue that I have observed.

I hope somebody could shed some light on this.

This post has been edited by braveheartleo: Nov 6 2013, 05:25 PM

I think what you want to show is this right?

ya better life cycle

powerbank model 6x18650 + 6 pics ICR18650D1

more than 12000mAh real output
https://forum.lowyat.net/index.php?act=ST&f...0#entry64742626

you done the test yourself?

ya, my here is electronic and notebook repair shop have all necessary equipment.

nice equipment you have. Do you measure internal resistance before parallel the 18650 batteries ?

hi what is the cheapest and powerful powerbank on market at the moment ?

New from box is battery is around 50mOhm, after first cycle charging will drop to around 46mOhm.

https://forum.lowyat.net/topic/3041790 have a look at one of top power powerbank

but cheapest? depend on your budget really. Someone say BMW is cheap also, but somebody else saying that viva is not affordable. Everything depend on budget and need.

Hi all,

Please participate in our Christmas Lucky Draw HERE

Good Luck!