5.3 won't hurt anything. Ham radio license when I was 10, which was 32 years ago. EE in college.
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(Review) 12000mAh Portable Power Bank Battery
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5.3 won't hurt anything. Ham radio license when I was 10, which was 32 years ago. EE in college.
Sent from my EVO using xda premium
I have the note 2 not the evo 4g lte. But when i googled this powerbank i found this thread so i decided to post and share.
Well my phone has a 3100mah battery and this battery pack can only charge the note 2 1.5 times before it completely dies. That is not right knowing the battery pack holds 12000mah. I would be happy if I can charge the phone 3 times but no. I think it doesn't hold near 6000mah capacity. Anyway, i returned the unit and it will be replaced. I hope the replacement is going to be better.
Well my phone has a 3100mah battery and this battery pack can only charge the note 2 1.5 times before it completely dies. That is not right knowing the battery pack holds 12000mah. I would be happy if I can charge the phone 3 times but no. I think it doesn't hold near 6000mah capacity. Anyway, i returned the unit and it will be replaced. I hope the replacement is going to be better.
I used the power bank while sitting outside my local hhgregg on black friday eve. I was getting a decent charge but when I was finished and my brother in law hooked up his galaxy s2 it seemed like his charge wouldn't charge with it. The phone was barely creeping up in battery percentage yet the little blue lights kept turning off indicating the bank was getting drained. Kinda weird.
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Weird. My lte wife's 3D our tablets. And my ipod all have charged off it at one point or another.
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I bought a 4500mAh battery and I get about two days on one charge, 3000 isn't bad though.
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There are some basics concepts in electricity that you need to understand, imagine that the pack is 12000mah (3.7V), that possible since these so called "AA" batteries are in fact 18650 batteries that are rated ... let's say between 1600mah and 3000mah => four 3000mah 18650 give you 12000 mah (3.7V)... ok for that.
Now the LTE got a 1500mah (3.7V) battery.... the mistake is to imagine that your "Power bank" can charge 12000/1500 = 8 times, this is simply not possible....
Power Bank : 12000mah (3.7V) (let's it is the real capacity)
LTE : 1500mah (3.7V) (let's say they are spot on too)
Best case :
1 - Energy : 12Ah * 3.7V = 44.4Wh <= Energy stored in the power bank
2 - You loose 10% in the conversion from 3.7V ( internal batteries ) to 5V ( USB port ) => 44.4Wh * 0.9 = 39,96Wh
3 - You loose 10% in the conversion from 5V ( USB port ) to 3.7V (internal battery of the phone, iThink.. whatever) => 39,96Wh*0.9 = 35.96Wh
4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh
Times recharging : 35,96Wh/5.55Wh = a little less than 6.5 Times
Worst case :
1 - Energy : 11Ah * 3.7V = 40,7Wh <= let's say they overestimate their batteries
2 - You loose 20% in the conversion from 3.7V to 5V => 40,7Wh * 0.8 = 32,56Wh ( low efficiency convertor)
3 - You loose 15% in the conversion from 5V to 3.7V => 32,56Wh*0.85 = 27,68Wh (****ty device..
)4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh (lets say this one is ok)
Times recharging : 27,68Wh/5.55Wh = a little less more than 5 Times
==> General conclusion, with a 12Ah (3.7V) powerbank you can recharge a fully depleted 1500mah (3.7V) between 5 and 6.5 times.
To be fair... the capacity of these banks should be rated under 5V and not 3.7V, the 12Ah (3.7V) would become a 8Ah (5V). To be more efficient the batteries inside these pack should be 5V... but they are not as common as the 3.7 (18650 is really everywhere now)
PS : If the device that needs to be charged got a 5V battery... the second conversion take near no energy (modern convertors).
About the note 2... its battery is 3100mah (3.7V)
Best case : 35,96Wh/(3,1*3.7) = 3,13 times
Worst case : 27,68Wh/(3,1*3.7) = 2,4 times
==> So your experience of a 2,5 times recharge times sounds pretty normal to me.
Last edited:
stanglifemike
Senior Member
@Honusnap - Good info man! Thanks for that post!!
Figured naming you this way would be better than quoting your long post
Sent from my White Evo LTE running MeanBean, using XDA Premium
Figured naming you this way would be better than quoting your long post
Sent from my White Evo LTE running MeanBean, using XDA Premium
There are some basics concepts in electricity that you need to understand, imagine that the pack is 12000mah (3.7V), that possible since these so called "AA" batteries are in fact 18650 batteries that are rated ... let's say between 1600mah and 3000mah => four 3000mah 18650 give you 12000 mah (3.7V)... ok for that.
Now the LTE got a 1500mah (3.7V) battery.... the mistake is to imagine that your "Power bank" can charge 12000/1500 = 8 times, this is simply not possible....
Power Bank : 12000mah (3.7V) (let's it is the real capacity)
LTE : 1500mah (3.7V) (let's say they are spot on too)
Best case :
1 - Energy : 12Ah * 3.7V = 44.4Wh <= Energy stored in the power bank
2 - You loose 10% in the conversion from 3.7V ( internal batteries ) to 5V ( USB port ) => 44.4Wh * 0.9 = 39,96Wh
3 - You loose 10% in the conversion from 5V ( USB port ) to 3.7V (internal battery of the phone, iThink.. whatever) => 39,96Wh*0.9 = 35.96Wh
4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh
Times recharging : 35,96Wh/5.55Wh = a little less than 6.5 Times
Worst case :
1 - Energy : 11Ah * 3.7V = 40,7Wh <= let's say they overestimate their batteries
2 - You loose 20% in the conversion from 3.7V to 5V => 40,7Wh * 0.8 = 32,56Wh ( low efficiency convertor)
3 - You loose 15% in the conversion from 5V to 3.7V => 32,56Wh*0.85 = 27,68Wh (****ty device..
4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh (lets say this one is ok)
Times recharging : 27,68Wh/5.55Wh = a little less more than 5 Times
==> General conclusion, with a 12Ah (3.7V) powerbank you can recharge a fully depleted 1500mah (3.7V) between 5 and 6.5 times.
To be fair... the capacity of these banks should be rated under 5V and not 3.7V, the 12Ah (3.7V) would become a 8Ah (5V). To be more efficient the batteries inside these pack should be 5V... but they are not as common as the 3.7 (18650 is really everywhere now)
PS : If the device that needs to be charged got a 5V battery... the second conversion take near no energy (modern convertors).
About the note 2... its battery is 3100mah (3.7V)
Best case : 35,96Wh/(3,1*3.7) = 3,13 times
Worst case : 27,68Wh/(3,1*3.7) = 2,4 times
==> So your experience of a 2,5 times recharge times sounds pretty normal to me.
and you need to know that it will consume more power if the phone is on. That is . If you chargue your phone been on. It will take more time to charge and it is more mah expended
Nice info up there on the power conversion.
Just another update, my powerbank doesn't charge my phone in AC mode any more which is disappointing. It only charges in USB mode.
Just another update, my powerbank doesn't charge my phone in AC mode any more which is disappointing. It only charges in USB mode.
You use this doohicky often? I'm still a little weary of it and only use it for power outages.
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9000 mAh Portable Power - Charge 2 devices at once
There is a 9000mAh battery pack from Trident Case that allows you to charge 2 devices at the same time...you can charge a phone and a tablet simultaniously.
It comes in 3 different colors: Blue, Black & Pink
There is a 9000mAh battery pack from Trident Case that allows you to charge 2 devices at the same time...you can charge a phone and a tablet simultaniously.
It comes in 3 different colors: Blue, Black & Pink
stanglifemike
Senior Member
^^^^ I thought the one in the OP would also do this. Will it not?
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Sent from my White Evo LTE running MeanBean, using XDA Premium
It will. I charged my phone and my brother in law charged his while sitting outside a store last black friday.
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Yeah, a few times a week. My phone is my workout timer, and the screen stays on with bluetooth and audio streaming so it sucks battery. If I know I won't be near a charger, I'll plug it into the battery pack during my workout.
Kinda sucks that it doesn't charge in AC mode anymore.
Question
Can someone help me I'm confused. Are these type of products battery chargers, external batteries, or both? I was looking for one today and because of the description I couldn't figure it out. I'm looking for something to plug my phone into while it is fully charged and have that thing deplete its battery before my battery is touched. Does that make sense?
Can someone help me I'm confused. Are these type of products battery chargers, external batteries, or both? I was looking for one today and because of the description I couldn't figure it out. I'm looking for something to plug my phone into while it is fully charged and have that thing deplete its battery before my battery is touched. Does that make sense?
Obviously.. it does
I got a SGSII (1650mah under 3.7V), without going into details and discussions about mine does more.. blablabla, as an example :
- Screen on the battery is depleted in 4.5 Hours => Current drawn is high => Charging phone screen on... is baaaadd (if you do not needs it on, keep it off)
- Pure 2G standby i got more than 3days => Current drawn is very low => Charging phone when off or when on standby (screen of) will make near no differences
---------- Post added at 03:16 AM ---------- Previous post was at 03:07 AM ----------
I suppose that it will works this way but constantly charging your device (phone in your case) is not very good for the durability of its battery. Never keeping a computer battery in a computer that is constantly connected to the power outlet... it will ruin your battery in a year.
Some nice computer have a special battery, throught a specific software i can "program" the battery to stop charging at 50%, 60% .. the info is ketp in the battery, putting it in an other computer and it will never goes higher than the choosen percentage. (My Vaio got this very usefull functionnality).
I know I have seen people using them in the way that I'm looking for but at the same time I don't want to ruin my battery either.. Maybe it does a trickle charge? Letting the phone battery discharge some?
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Yoobao 13,000 mah portable charger. Two usb ports and an led flash light in the middle. There are YouTube videos on this. I bought mine on eBay for $35 brand new. I highly recommend this charger.
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Sent from my EVO using xda premium
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There are some basics concepts in electricity that you need to understand, imagine that the pack is 12000mah (3.7V), that possible since these so called "AA" batteries are in fact 18650 batteries that are rated ... let's say between 1600mah and 3000mah => four 3000mah 18650 give you 12000 mah (3.7V)... ok for that.
Now the LTE got a 1500mah (3.7V) battery.... the mistake is to imagine that your "Power bank" can charge 12000/1500 = 8 times, this is simply not possible....
Power Bank : 12000mah (3.7V) (let's it is the real capacity)
LTE : 1500mah (3.7V) (let's say they are spot on too)
Best case :
1 - Energy : 12Ah * 3.7V = 44.4Wh <= Energy stored in the power bank
2 - You loose 10% in the conversion from 3.7V ( internal batteries ) to 5V ( USB port ) => 44.4Wh * 0.9 = 39,96Wh
3 - You loose 10% in the conversion from 5V ( USB port ) to 3.7V (internal battery of the phone, iThink.. whatever) => 39,96Wh*0.9 = 35.96Wh
4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh
Times recharging : 35,96Wh/5.55Wh = a little less than 6.5 Times
Worst case :
1 - Energy : 11Ah * 3.7V = 40,7Wh <= let's say they overestimate their batteries
2 - You loose 20% in the conversion from 3.7V to 5V => 40,7Wh * 0.8 = 32,56Wh ( low efficiency convertor)
3 - You loose 15% in the conversion from 5V to 3.7V => 32,56Wh*0.85 = 27,68Wh (****ty device.. )
4 - The LTE battery energy : 1,5Ah*3.7V = 5,55Wh (lets say this one is ok)
Times recharging : 27,68Wh/5.55Wh = a little less more than 5 Times
==> General conclusion, with a 12Ah (3.7V) powerbank you can recharge a fully depleted 1500mah (3.7V) between 5 and 6.5 times.
To be fair... the capacity of these banks should be rated under 5V and not 3.7V, the 12Ah (3.7V) would become a 8Ah (5V). To be more efficient the batteries inside these pack should be 5V... but they are not as common as the 3.7 (18650 is really everywhere now)
PS : If the device that needs to be charged got a 5V battery... the second conversion take near no energy (modern convertors).
About the note 2... its battery is 3100mah (3.7V)
Best case : 35,96Wh/(3,1*3.7) = 3,13 times
Worst case : 27,68Wh/(3,1*3.7) = 2,4 times
==> So your experience of a 2,5 times recharge times sounds pretty normal to me.7Weighs at only 8.9oz, it pack's 12,000 mAh battery in a small package, enough to charge your mobile phones and more. Perfect for everyday use, longer trips and emergency situations.
Features:
Highest quality Li-Pol battery with capacity of 12,000mAh (LTE battery is rated as ~2,000mAh)
Dual USB outputs to charger 2 devices at the same time
Give your smartphone up to 95 hours of extra talk, internet, and video time, so you can truly enjoy what your phone can offer
2.1A output to charge your lte or tablet efficiently
Compatible with all cell phones with micro USB connection, such as Blackberry, HTC, Samsung, Motorola, LG, etc.
the battery comes with a number of different tips. This ensures that it is as universal as possible. In addition to a wall adapter and a cable for charging the battery the system includes tips for Sony PSP, Sony Ericsson, Samsung, Nokia, miniUSB, microUSB and, of course, Apple mobile devices. Last year this nice array of tips would have been important. Yes, we’ve all become a bit boring with regard to what we actually carry day in and day out, but something tells me this won’t last for long. I’m not sure what new device will woo each of us, but I have no doubt there will be something.
Input:
DC 5V/1A
Output: USB1: DC 5V/1A; USB2: DC 5V/2.1A
Battery capacity: 12,000 mAh
Dimension: 5″ x 3″ x 0.92″ (127mm x 76mm x 23mm)
Weight: 8.9oz (250gram)
this battery is a beast. It has a huge charge capacity and yet it is fairly compact and light. It is also simple to use. There is one button on the top that, when depressed, shows you how much charge is available and begins the flow of current.
On one end you will see the microUSB charging port that will make sure the battery is up to a long, grueling day of use. To the left of it is a 1A USB port. This will charge your lte as ac. On the other side is the 2A USB this charges as a dc current.
And, of course, the battery can be used as a flashlight. The first time I saw an external battery with this feature I was like “Why?” Then I actually started using it and discovered that it comes in rather handy. The light on this one is bright. That, combined with the capacity a fully charged Power Bank will offer would likely mean this light could be turned on at the start of CES 2012 and still be going when it comes time for CES 2013. (Okay not so much, but you get the point.)
This Power Bank 12,000 mAh Battery is a huge battery in a small package. It is well made, feels quite sturdy, packs a punch and has pretty much all the tips you are going to need
I bought mine off ebay for 25 bucks. best 25 i have ever spent. my self with my lte. My wife with her 3D down to my ics tablets. all have fully charged and still it had juice. i leave it laying around all the time. i hardly ever have to charge it up fully.
see pics.
comes in white and black . here is link to black i bought..
http://www.ebay.com/itm/12000mAh-Po...02098?pt=Battery_Chargers&hash=item416ab32ef21
thanks added link to first post for the black. what i bought. they have white too just see his store. but for the price this thing has been a tank.1Ya there are other sellers. Just type in 12000 mAh battery bank on ebay. Here's another same one in black 25 bucks.
Http://pages.ebay.com/link/?nav=item.view&id=271014202988
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well not 100% sure. i havent charged it in a long time. ive used it a few times on my tablet. she used it 6 times. so it lasted.
