I have a 5,000 mah power bank from EasyAcc. It's nice that it has a built in MicroUSB cable but it doesn't seem to last very long. It only charged my OPO from 35% to 95% before emptying out. The OnePlus Power Bank advertises "three full charges" and I haven't seen any reviews that really test the true capacity, they all just mention the price and looks.
You're probably better off asking this on the OnePlus forums, they should have an entire section for the power bank there.
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Transmitted via Bacon
pls check if the power bank is fully charged ? As a professional power bank supplier, we normaly will charge the power bank in our workshop(we call it aging), but not 100% charged. And the electricity will disappear with the long time to ship to you.
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External battery chargers are a tricky thing, how much capacity should we get? Our S4 have a 2600mah battery hence a 2600mah power bank should do the trick? FALSE. Read on.
The voltage of the power cells in the power banks are at 3.7v but the USB output is at 5V. This means that at 5V the equivalent capacity of the power cells are diminished due to the higher voltage. As a result, the effect "mah" of a power bank is usually <75% of what is mentioned due to the voltage difference. And this figure does not factor in the loss due to conversion. Most of the time, higher quality power banks would have a conversion efficiency of 90% but the cheaper quality power banks can have and a conversion rate of as low as 70%.
Another important fact about cheaper power banks is that they are often have a lower capacity internal power cells.
For easy reference and assuming a 70% conversion rate, get a power bank that is at least 2 times the stated capacity of your devices' battery and ideally you would only need to get a power bank that is 1.5 times the stated capacity.
Hence, if your s4 has a 2600mah, you'll have to get at least a 3900mah power bank and depending on the quality of the power bank it might have to be 5200mah
More math and physics will be included if required.
http://www.banggood.com/Teclast-T52A-5200mAh-Power-Bank-Charger-For-Tablet-IPhone-p-76746.html
This is a good choice. I've got a 10400mah and it is fantastic for charging my phone and tablet.
A huge plus is that apparently this chinese brand uses Samsung Battery cells which is good and it has a 90% conversion rate.
I posted something similar in the battery case thread below. That is why I just carry a spare battery. Half the size of an external pack and I get the full capacity.
alphadog00 said:
I posted something similar in the battery case thread below. That is why I just carry a spare battery. Half the size of an external pack and I get the full capacity.
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Yeah but that's only as convenient when your case is easy to remove and put on.
A spare battery would be ideal for bumpers probably.
lambstone said:
Yeah but that's only as convenient when your case is easy to remove and put on.
A spare battery would be ideal for bumpers probably.
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True, and you have to power down to make the switch. But the external batteries are not small, and you have to carry them around and leave your phone tethered to it when you use the phone.
When i have all my gear and i am traveling i have a 3000mah external battery in my backpack. When I am going out without a backpack and i am gone all day and need more juice, i through a spare phone battery in my pocket and i don't even notice it there.
13000mah battery
I personally got the limeade blast good price if you do the math vs other chargers, 2 usb ports and ledd light is usefull no to mention the monster 13000mah capacity,
Im struggling to believe that there is a 30% loss in conversion. I have a 3500mAh power bank and it charges my galaxy nexus almost 2 times. The galaxy nexus has a 1750mAh battery and the power bank completes 1 full charge and the 2nd charge reaches roughly 85%. There is some loss but it isnt as high as the ~30% stated here.
Sent from my SGH-I337M using Tapatalk 4 Beta
I like portable battery chargers. In addition to my ZeroLemon 7500mah battery, I also own a PowerGen 9000mah battery pack that has a 2A output port. I've been using it since last year when I got my S2 and it's very handy to have (although I don't use it anymore due to the ZeroLemon battery).
sharpknight said:
I personally got the limeade blast good price if you do the math vs other chargers, 2 usb ports and ledd light is usefull no to mention the monster 13000mah capacity,
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Link perhaps?
msavic6 said:
Im struggling to believe that there is a 30% loss in conversion. I have a 3500mAh power bank and it charges my galaxy nexus almost 2 times. The galaxy nexus has a 1750mAh battery and the power bank completes 1 full charge and the 2nd charge reaches roughly 85%. There is some loss but it isnt as high as the ~30% stated here.
Sent from my SGH-I337M using Tapatalk 4 Beta
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Like I said, it is up to 30% loss during conversion. It's also dependent on the quality of your power bank
links
lambstone said:
Link perhaps?
Like I said, it is up to 30% loss during conversion. It's also dependent on the quality of your power bank
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i dont have enough posts to post links yet. just google limeade blast
msavic6 said:
Im struggling to believe that there is a 30% loss in conversion. I have a 3500mAh power bank and it charges my galaxy nexus almost 2 times. The galaxy nexus has a 1750mAh battery and the power bank completes 1 full charge and the 2nd charge reaches roughly 85%. There is some loss but it isnt as high as the ~30% stated here.
Sent from my SGH-I337M using Tapatalk 4 Beta
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Here is another link with more details, but google can provide more
http://www.papasys.com/showthread.php?t=1239
the good information regarding the battery capacity and its requirements for a power charging you have posted right here .. and the link for external batter charger you have provided is another interesting one and I'm finding is absolute apt for my on the go battery backup needs so thinking of making a deal soon .. thanks to share..
Claribelsmith said:
the good information regarding the battery capacity and its requirements for a power charging you have posted right here .. and the link for external batter charger you have provided is another interesting one and I'm finding is absolute apt for my on the go battery backup needs so thinking of making a deal soon .. thanks to share..
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Yeah, so far I am rather impressed with the Teclast power bank, I've used those cheap no-name power banks that you obtain from eBay and they are rubbish. The physical quality is good too which is also more than I can say for others. Do no buy solar panel equipped power banks, they are useless.
The battery capacity of my 10400mah power bank is really good though it's a pain to charge it up.
i have a naztech 10800mamp and a MyCharge Peak 6600mamp battery banks and prefer the naztech 10800mamp one with 5 usb ports all of which can charge at the same time. I can charge my 2 nexus 7 tablets and my 2 phones and a camera at the same time from this naztech powerbank and am happy with it. see my video comparison in my youtube uploads linked in my tag line. but i havent found the need for a battery bank yet with my S4 as am happy with the S4 internal battery for now.
need suggestions for buying portable chargers(power bank) . thanks in advance :fingers-crossed:
charger from Sony is good
vineethng said:
charger from Sony is good
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ya i bought sony 5000 mah portable charger
maybe you could check this one
I use this power bank:KINKOO,it works well ,i have charged my phone 5 times already and it still has juice in it.has 8,000mAh capacity and intelligent output control system(no matter which phone use).this Valentine's day they have discount,25% OFF your order.
Expire date: 2014-2-14,you could check it:www.ikinkoo.com
suggestions for you
What’s the different between branded power bank and generic power bank?
Branded power bank mostly sell in REAL CAPACITY. Generic power bank mostly sell in MARKING CAPACITY. That’s the reason why you will never see any branded power bank (standard size) have anything as high as 30000mAh – 50000mAh. That’s also the reason why a good 12000-13000mAh power bank are able to charge more or about the same like the market 30000-50000mAh power bank
Is it true branded power bank won’t explode and generic power bank will explode?
Anything to do with battery, will have chance to explode. No matter it’s branded power bank or generic power bank.But chances for both branded and generic power bank to explode are near to 0%.If power b
have u try ipolar? it use japan batery and i use it well
My phone is Asus Zenfone 2 (2GB) It.s charger's specifications are - 5.2V , 1.35A. and battery - Li-Po 3000 mAh battery. When charging via the charger, it gets 100% charged.
I recently purchased Ambrane 13000mAH Li-Po battery Power Bank with 5 V, 2.1A and 1A output ports.
When charging my Zenfone 2 via Power Bank, the charging stops sharp at 85%. Initially I thought the Power Bank might be faulty, so I drained my phone's battery to 20% and connected it to the 2.1A port again. And surprisingly it charged my phone again to 85% where again it stopped charging.
Now the functionality of the PowerBank says, when the phone is 100% charged, the PowerBank would wait for few seconds and then will automatically shut down (auto disconnect feature). So, I think at 85% my phone signals the Power Bank, that it is fully charged, and now it should stop charging it any further. However, this is just a lame assumption. But neither do I know what changes in the settings do I need to make nor do I know how to get out of this.
A thought - Can the PowerBank be faulty ? ( 1 time charged Power Bank charged my phone 2+ times to 85%, the 3rd time it reached 65%)
rachitsaxena2 said:
My phone is Asus Zenfone 2 (2GB) It.s charger's specifications are - 5.2V , 1.35A. and battery - Li-Po 3000 mAh battery. When charging via the charger, it gets 100% charged.
I recently purchased Ambrane 13000mAH Li-Po battery Power Bank with 5 V, 2.1A and 1A output ports.
When charging my Zenfone 2 via Power Bank, the charging stops sharp at 85%. Initially I thought the Power Bank might be faulty, so I drained my phone's battery to 20% and connected it to the 2.1A port again. And surprisingly it charged my phone again to 85% where again it stopped charging.
Now the functionality of the PowerBank says, when the phone is 100% charged, the PowerBank would wait for few seconds and then will automatically shut down (auto disconnect feature). So, I think at 85% my phone signals the Power Bank, that it is fully charged, and now it should stop charging it any further. However, this is just a lame assumption. But neither do I know what changes in the settings do I need to make nor do I know how to get out of this.
A thought - Can the PowerBank be faulty ? ( 1 time charged Power Bank charged my phone 2+ times to 85%, the 3rd time it reached 65%)
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Hello and thank you for using XDA Assist.
It's not unusual for external batteries to show somewhat erroneous charge levels and there is probably no reason for you to worry about this too much, but fortunately there is an XDA area dedicated to the Asus Zenfone 2 at http://forum.xda-developers.com/zenfone2 which would be a good starting place. I suggest you post your question with all relevant details in the Accessories forum there at http://forum.xda-developers.com/zenfone2/accessories where the experts familiar with your device will be best able to advise you.
Good luck!
Mike B. said:
Hello and thank you for using XDA Assist.
It's not unusual for external batteries to show somewhat erroneous charge levels and there is probably no reason for you to worry about this too much, but fortunately there is an XDA area dedicated to the Asus Zenfone 2 at http://forum.xda-developers.com/zenfone2 which would be a good starting place. I suggest you post your question with all relevant details in the Accessories forum there at http://forum.xda-developers.com/zenfone2/accessories where the experts familiar with your device will be best able to advise you.
Good luck!
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Thanks a lot for the quick response.
I have a OnePlus One and the charging is odd. At the wall with the official OnePlus One it charger and cable at the rate of roughly .88a to 1.2a and sometimes more. With my Power Bank which is a Hotway ProBox 10400mAh Power Bank Black it charges at the rate of just about .4 to .5 which is not enough for my phone while in use. The Power Bank can output to a total if both usb ports if both are in use up to a total of 2.1a together and just one and that's with the cable that it came with! Even with the OnePlus One usb cable its not that much different. The Power Bank is pretty much new as I have bought it a few days ago. The voltages is normal (5v-ish) when charging with the official charger but when charging the Power Bank it charging at the rate of right now as I am charging it it hovers around 4.8v .55a I have checked that it is charging on AC not on USB. I have done extensive research that it is the cable the cable that is the problem but its really not in my case since I was using the cables that came with the charger and the Power Bank. I have gotten these numbers with my Charger Doctor not some app which is something more accurate.....
There is no warranty with the phone since its the chinese model. I have gotten the phone a couple of months before the OnePlus 2 since I kinda need a camera for school work for a school trip coming up and One Plus does not ship to Australia. Right now I am broke and not willing to crack open the phone.
Oh sorry if I misused some terminology here.
mehdont said:
I have a OnePlus One and the charging is odd. At the wall with the official OnePlus One it charger and cable at the rate of roughly .88a to 1.2a and sometimes more. With my Power Bank which is a Hotway ProBox 10400mAh Power Bank Black it charges at the rate of just about .4 to .5 which is not enough for my phone while in use. The Power Bank can output to a total if both usb ports if both are in use up to a total of 2.1a together and just one and that's with the cable that it came with! Even with the OnePlus One usb cable its not that much different. The Power Bank is pretty much new as I have bought it a few days ago. The voltages is normal (5v-ish) when charging with the official charger but when charging the Power Bank it charging at the rate of right now as I am charging it it hovers around 4.8v .55a I have checked that it is charging on AC not on USB. I have done extensive research that it is the cable the cable that is the problem but its really not in my case since I was using the cables that came with the charger and the Power Bank. I have gotten these numbers with my Charger Doctor not some app which is something more accurate.....
There is no warranty with the phone since its the chinese model. I have gotten the phone a couple of months before the OnePlus 2 since I kinda need a camera for school work for a school trip coming up and One Plus does not ship to Australia. Right now I am broke and not willing to crack open the phone.
Oh sorry if I misused some terminology here.
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Hello,
I have reported this thread to be moved to right Q and A section where you might be able to get help more quickly.
-Vatsal
Hello I recently bought a 20000mAh Dual USB Power Bank Case Kit 6X 18650 (Power Bank) and I tried to charge my phone (Samsung galaxy S4), but it doesn't seem to charge UNLESS something else is charging with my phone. I tried with more than 3 cables that usually work and it doesn't change anything. Before that, I had chinese power banks and it was working but this time, it doesn't.
Thanks for reading.
some power bank have auto off features when there is no amp request
some batteries will cut off charging at initial charge phase to check it self.
that powerbank suck. can't it wait just few more seconds?