External Battery Pack? (Small) - Nexus 4 Q&A, Help & Troubleshooting

I've been searching and searching for good battery packs, but I really don't need anything more than 1 full battery life for my N4. I would actually like it if it can fit my pocket, with the cable and the phone.
What's the best and smallest external battery pack?

http://www.amazon.com/Portable-Exte...qid=1369175734&sr=1-11&keywords=anker+battery
Smaller than the phone and has the micro-usb plug built-in.
$28
Or you could get the Zerolemon battery case. $41
I recommend the Anker. Not enough juice for my taste but the size and built-in cable are fantastic.
More battery packs should have built-in cables IMO

I haven't tried this one, but looks very good and portable.
http://www.amazon.com/Anker-Ultra-C...Bolt-Blackberry/dp/B005NF5NTK/ref=pd_cp_cps_2

The newer Slim3 is better http://www.amazon.com/Portable-Micr...8&qid=1377634085&sr=1-1&keywords=anker+slim+3
But if you really want ridiculous small sizes, then go for those flashlight/lipstick sized ones.

Now the size of that Anker Astro Mini is what I've been looking for!

facetubespam said:
The newer Slim3 is better http://www.amazon.com/Portable-Micr...8&qid=1377634085&sr=1-1&keywords=anker+slim+3
But if you really want ridiculous small sizes, then go for those flashlight/lipstick sized ones.
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Click to collapse
Ah damn, new model already. 6000mah should be a good amount of charge.
ibarra21 said:
Now the size of that Anker Astro Mini is what I've been looking for!
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Click to collapse
Eh, but the problem is you need to also lug around a cable. The Slim is a really good size. Kind of like carrying two phones. Not too awkward to hold and use while charging either.

ziddey said:
Ah damn, new model already. 6000mah should be a good amount of charge.
Eh, but the problem is you need to also lug around a cable. The Slim is a really good size. Kind of like carrying two phones. Not too awkward to hold and use while charging either.
Click to expand...
Click to collapse
Cable's not a problem, I have a very short one that doesn't tangle around my pocket. I don't even know where I got this lol. But with that Slim + a small cable and phone, my pocket wouldn't feel bulky at all. Already ordered one, hopefully it's a good one.

Are these a joke and not to be trusted?
http://www.ebay.co.uk/itm/8000mAh-B...582?pt=LH_DefaultDomain_3&hash=item1e7ee6cfd6
http://www.ebay.co.uk/itm/12000mah-...d=100005&prg=1048&rk=1&rkt=5&sd=130978074582&
http://www.ebay.co.uk/itm/50000mAh-...d=100005&prg=1048&rk=3&rkt=5&sd=130978074582&

3200mAh, cord hides inside and about the size of an iPod. http://www.amazon.com/gp/aw/d/B0054U6CEE/ref=mp_s_a_1_2?qid=1378048297&sr=8-2&pi=SL75
Sent from my Nexus 4 using Tapatalk 4

i have this Powerbank: http://www.amazon.de/PowerBank-Lade...909&sr=8-1-spell&keywords=Batterypack+nexus+4
It's a very functionally thing. I love it.

like the integrated cable - I have bought 2 NewTrent external powerpacks over the years (I lost the first one).
Also available on Amazon, and they are often heavily promoted. They are good quality, and have a huge range of capacities available. Though unless you are planning going into the jungle for a week, I would get something in the 3-4,000mAh range.
That is 1-2 days' heavy use, and since capacity is lineally proportional to size and weight, you get that capacity for about the same size as a normal smartphone.

BoneXDA said:
Are these a joke and not to be trusted?
http://www.ebay.co.uk/itm/8000mAh-B...582?pt=LH_DefaultDomain_3&hash=item1e7ee6cfd6
http://www.ebay.co.uk/itm/12000mah-...d=100005&prg=1048&rk=1&rkt=5&sd=130978074582&
http://www.ebay.co.uk/itm/50000mAh-...d=100005&prg=1048&rk=3&rkt=5&sd=130978074582&
Click to expand...
Click to collapse
I own one of these and it works pretty damn good.
Sent from my Nexus 4 using XDA Premium 4 mobile app

12000mA, $10 shipped.
http://www.ebay.ca/itm/121138980680?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

I've been using this powerbank from Nokia.
Didn't want to get an unknown brand especially since we don't have removable batteries that we can take a risk with.
Been using it for a month now. Gives me about one full charge. Very reasonably priced for what it does. Would recommend.

Related

higher capacity battery?

is there going to be one? this is a pretty popular phone, well when it hits all over that is... i ask cause with my phone the battery life is really not enough at all, and some times i wouldnt mind bulkier phone if i need the power for wifi or gps to last longer...
drutort said:
is there going to be one? this is a pretty popular phone, well when it hits all over that is... i ask cause with my phone the battery life is really not enough at all, and some times i wouldnt mind bulkier phone if i need the power for wifi or gps to last longer...
Click to expand...
Click to collapse
I am sure lionbattery will roll one out after some time.
I will jump all over an extended battery. I'm pissed because I just ordered an extended battery for my 8525 and now I'm about to upgrade to the Kaiser. (Didn't realize the Kaiser was released so soon when I ordered the battery).
An extended battery is a must. I use pushmail so my internet connection is always enabled. That drains my battery SO FAST.
What about this?
http://www.thepocketsolution.com/PSI-31863.html
Regards,
Nika.
nikagl said:
What about this?
http://www.thepocketsolution.com/PSI-31863.html
Regards,
Nika.
Click to expand...
Click to collapse
Dont do that. I bought a 3600mah for the same price or less that's the same size. That's what im talking about though it makes the phone really bulky.
I just rather carry an external 4 AA battery charger. It lasts me 3 days continual usage. The AA batteries are each 2800mAh and are rechargeable. So enjoy!
really 4AA last that long? but hmm dont you have to have the batteries in a diff unit and then that unit is connected via USB? or how?
btw i think ill be skipping on kaiser, i got a used 8525 for the price of just the phone but with 2x 1500 bat and i believe a 3000 one... plus the original battery as well with the external battery charger this is great... which it came with as well
reasons for skipping is because of tmobile, who knows when they will get there act together, and i really want a phone that has vga for web now... i can see how it would make a big diff, but the battery will have to be like 1500 stock+ or so to run well i believe.
finaly! (maybe)
http://www.thepocketsolution.com/PSI-42624.html
Any one have any info on this? or willing to take one for the team?
jinnosuke said:
http://www.thepocketsolution.com/PSI-42624.html
Any one have any info on this? or willing to take one for the team?
Click to expand...
Click to collapse
Mmmm. Their site says "we’ve established that our extended, larger battery is a good thing" - physically bigger then??? That's worrying.
This looks much more like it http://www.thepocketsolution.com/PSI-42477.html
Or this http://www.thepocketsolution.com/PSI-42769.html
mcwarre said:
Mmmm. Their site says "we’ve established that our extended, larger battery is a good thing" - physically bigger then??? That's worrying.
This looks much more like it http://www.thepocketsolution.com/PSI-42477.html
Or this http://www.thepocketsolution.com/PSI-42769.html
Click to expand...
Click to collapse
Those should work with Kaiser, right? This would be a great and cheap solution to carry in my bag if I know i'll need extra juice.
EDIT: was browsing their site and found this http://www.thepocketsolution.com/PSI-42765.html so I answered my own question :-D
mcwarre said:
Mmmm. Their site says "we’ve established that our extended, larger battery is a good thing" - physically bigger then??? That's worrying.
This looks much more like it http://www.thepocketsolution.com/PSI-42477.html
Or this http://www.thepocketsolution.com/PSI-42769.html
Click to expand...
Click to collapse
I dont think its a external charger its a extended battery "Replacement HTC Kaiser Extended Battery." so it says. I guess we have to wait for the picture to tell what it really is...
Rather than spending money on AAA batteries, might I suggest something from these guys. It will also work with your iPod. I have just ordered mine. http://www.batterygeek.net/IPod_Accessories_s/5.htm
fromamerica said:
Rather than spending money on AAA batteries, might I suggest something from these guys. It will also work with your iPod. I have just ordered mine. http://www.batterygeek.net/IPod_Accessories_s/5.htm
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Click to collapse
Why AA batterys? Because AA batterys can be had just about ANYwhere. From a quickstop, WalMart, or even rob them out of another device to get your phone back up and running. Plus you can use rechargable batterys too. I use the battery extender from ThePocketSolutions. Have been for over a year and a half. I personally keep the lithium camera batterys in mine. I only use it in a pinch when I don't have access to a charger.
I see your point about rechargeables, guess they would work the same way, and probably save money at the same time.
The Kaiser battery page has been updated. The capacity is 2800mah The picture is kind of blury. The back cover looks to be original but sticks out. hmm 2800mah for $60+shipping or 2700mah on ebay for $31+shipping. c'mon 3200mah.... anyone??
cproaudio said:
The Kaiser battery page has been updated. The capacity is 2800mah The picture is kind of blury. The back cover looks to be original but sticks out. hmm 2800mah for $60+shipping or 2700mah on ebay for $31+shipping. c'mon 3200mah.... anyone??
Click to expand...
Click to collapse
Has anyone tried the 2700mAh battery on Ebay? There seems to be two sellers selling these batteries with cover; one from Hong Kong and one from UK.
I ve just orderer a 2700 ma battery on ebay from hong kong. I bought a 2400 ma battery from them one year ago for my Hermes and I was happy with it. So I can say they are proffesional people. And only 19 dollars!!
Dani
Mmm, I'm just afraid these third party batteries explode after a while. I'm interested in ordering one as well but I'm looking for a hard case that will fit with it. Otherwise, using one of those high capacity batteries would mean that I'm left without a proper case. I have an Axim X50v with an extended battery and a fitting PDair case so it shouldn't be impossible to make a fitting one.
Just found an even higher capacity battery for the Tilt at 3000mah. But the back cover made the phone really thick. The back cover does look shiny
http://4ustuff.com/info.php?itno=2277
Edit: damn its wholesale only.

6000mAh external battery w/ solar charger for £15 !

I came across this on ebay: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=170212826483
It's a solar charger with 6000mAh internal battery. Output voltage is 5.5V and output current 1A. For me it seems to be perfect for our Kaisers.
I doubt you would get even external battery with such capacity for this price (it's £20 including P+P to Slovakia). And this thing even charges itself "on its own".
I will be probably buying one in a few days, but I would like to know if anybody has any experience with or opinions about this (such) device. Please share.
In my understanding it's only a solar-charger not an extended battery.
It would be nice to get an extended battery included the solar charger for Kaiser.
It does have 6000mAh acumulator inside and it can be charged via (included) AC adapter. So in a sense - it is (and can be used as) external battery extender.
Yes, actually it is so, but then it's too heavy to carry.
My wish is to have an extended battery with solar charger on the back cover. I know its just a wish, but would be a nice accessory.
Oh, I see what you are up to. IMO that would be inpractical, since you would have to have your Kaiser laying top-side-up to charge. Something like this might come to your interest (if they would make it for Kaiser, that is): http://gpsforless.co.uk/product_details.php?id=12048 It's an iPhone case that has Solar panel on the front of it.
Yes, something like that. I don't feel unpractical until I can find a smooth surface to lay down kaiser on LCD panel. Before some Nokia model came with such solar panel, I think great solution.
omikr0n said:
Oh, I see what you are up to. IMO that would be inpractical, since you would have to have your Kaiser laying top-side-up to charge. Something like this might come to your interest (if they would make it for Kaiser, that is): http://gpsforless.co.uk/product_details.php?id=12048 It's an iPhone case that has Solar panel on the front of it.
Click to expand...
Click to collapse
just have an off topic question. What battery are u using now? If some extended, where did u buy it? I cant seem to find a store here in Slovakia that sells batteries for Kaiser.
I'm using Mugen Power 1500mAh.
I bought through Eten webshop
HLI-P4550SL Mugen Power 1500mAh Extended Battery For TYTN II (P4550) / HTC Kaiser 120, T-Mobile MmDA Vario III, Vodafone V1615, AT & T Tilt 8925 (Cingular)
http://forum.xda-developers.com/newreply.php?do=newreply&noquote=1&p=2144840
Sorry wrong link. The correct one:
http://shop.eten.hu/batteries-c-25.html?page=2&sort=3a
Mikulec said:
just have an off topic question. What battery are u using now? If some extended, where did u buy it? I cant seem to find a store here in Slovakia that sells batteries for Kaiser.
Click to expand...
Click to collapse
I currently use only OEM 1350mAh that came with my Kaiser. I have, however, bought this extended 2800mAh battery from ebay, which I am still waiting to arrive. I think ebay is the way to go for things like these - they are very expensive and hard to get in standard shops in Slovakia.
And I am very much considering the external battery w/ solar charger mentioned in my first post. I would use it especially for long (couple of days) bike trips that I will be doing. And £20 price for such thing is extremely good price
igkovacs said:
I'm using Mugen Power 1500mAh.
Click to expand...
Click to collapse
How does it work for you? Is there any noticable difference in battery life compared to OEM 1350mAh?
omikr0n said:
I currently use only OEM 1350mAh that came with my Kaiser. I have, however, bought this extended 2800mAh battery from ebay, which I am still waiting to arrive. I think ebay is the way to go for things like these - they are very expensive and hard to get in standard shops in Slovakia.
And I am very much considering the external battery w/ solar charger mentioned in my first post. I would use it especially for long (couple of days) bike trips that I will be doing. And £20 price for such thing is extremely good price
Click to expand...
Click to collapse
I was thinking about buying a new battery, but the fact that I will have to buy a new case also is stopping me from buying it. Give us a little feedback about the battery and also about the solar charger when u will get them. I am really curious.
Okay I will. I am not yet definitely decided if I will buy that solar charger, though.
omikr0n said:
How does it work for you? Is there any noticable difference in battery life compared to OEM 1350mAh?
Click to expand...
Click to collapse
Not really (may be 2hrs longer uptime), but I needed a spare battery as well. You also can buy 2000-3000mAh battery, those should be significantly longer uptime, but they come with a wider back-cover.
Okay, thanks for info.
@all:
I have just bought that 6000mAh solar charger. Will inform you in this thread, when I recieve it.
i too have recently ordered this, hope it is as good as it claims to be, or at least nearly as good, hope I don't have to wait too long for it to be shipped from Hong Kong
I have been astonished by its specification (and price), too. If it is going to be as good as it claims then the money spent will be surely worth it.
do you guys know if you can change the internal battery? for that price i skeptical about the quality of the 6000mah battery. can the solar panel charge the phone directly?
i don't know, i am waiting on delivery any time from 3 days til a week away from recieving it, will tell you all about it with pics if i get it before omikr0n
If the battery is totally dead, can it run the phone on solar power alone?

Energizer XP4000 Portable Charge

http://www.newegg.com/Product/Product.aspx?Item=N82E16875998388
good deal on the xp4000, the xp2000 is selling for the same price though free shipping
I got the 8000mah model for 40 a few months ago from Woot and these are great chargers.
I'm curious, what is the advantage of this over just having a couple Ebay spare batteries and external charger? It seems like the spare batteries are a lot smaller and you can just swap them out. Not trying to a make a point or anyting - but I just dont understand the advantage. I actually have four batteries and 2 chargers and have at least one spare with me at all times. And I got those for cheaper than this Energizer product. Thanks!
Alot of people do not like having to take their case and battery cover off all of the time to switch batteries. I have broken two of my Seidio cases becuase of having to take it off once a day to change my battery.
Makes sense. I guess it is kind of pain to reboot and everything. I have a relative that works at Energizer and prob get me one for very cheap. Might try it out...
wiltok said:
I'm curious, what is the advantage of this over just having a couple Ebay spare batteries and external charger? It seems like the spare batteries are a lot smaller and you can just swap them out. Not trying to a make a point or anyting - but I just dont understand the advantage. I actually have four batteries and 2 chargers and have at least one spare with me at all times. And I got those for cheaper than this Energizer product. Thanks!
Click to expand...
Click to collapse
This is a solution for all my gadgets. Ipod, ipad, cell phone, bluetooth headphones etc can all charge off of one pack. whereas a second battery only helps the evo. sweet find, but like the stroths said, i think i'm gonna wait for an 8000mah
stroths said:
I got the 8000mah model for 40 a few months ago from Woot and these are great chargers.
Click to expand...
Click to collapse
thanks for telling me about woot, looks kewl
elapshtc said:
thanks for telling me about woot, looks kewl
Click to expand...
Click to collapse
Dude, just wait till they do a woot-off. they sell one item at a time until it sells out, then load up another item and so on all day long. it's awesome!
I recommend getting woot watcher from the market if you are a fan of woot. Awesome during woot-offs.
Sent from my PC36100 using XDA App.
tgruendler said:
I recommend getting woot watcher from the market if you are a fan of woot. Awesome during woot-offs.
Sent from my PC36100 using XDA App.
Click to expand...
Click to collapse
i didn't even know this existed. thank you!!
Here is an alternative that I use and is a 5400
splash Intense 5400mAh External Battery Pack
http://www.amazon.com/gp/product/B003NTYYXY/ref=oss_product
You can connect two devices if you have the other cable. I like it and it charges my evo about three times from 30% to 100%
BTW.. You have to push the ON button for it to charge your EVO. There was one dumb arse complaining about it but it tells you in the instructions that you have to turn it ON for it to work.
A 8000 mah external battery is gonna be a friggin BRICK. Hope you have big pockets.
I bought two energizer portable battery chargers- on sale once. I had a military exercise and was going to be in areas where no electrical outlets. Charged them fully and was happy until the freaking port of the energizer charger caved in. Took them BOTH back and got my money back and bought two 3500mAh batteries on ebay instead the next day. I just plugged the usb cable that came with it gently and it broked off inside. It ain't military grade....

Use your spare Galaxy S II batterys with your Note

The GSII battery fits in and works with the Note. At least the battery from the AT&T and international versions of the GSII does. When looking at the back of your phone, inserting the battery all the way to the left and up allows the contacts to connect properly and all of the extra space is to the right and below. There's ~.230" of space to the right and ~.334" of space at the bottom. The GSII battery has 4 contacts, but the Note only has 3 terminals. I don't know what the 4th contact is for on the GSII battery, but it works just fine in the Note without being connected.
I cut some strips of cardboard, glued them together, cut a rectangle of thick paper, glued the cardboard stacks to the paper, then applied a layer of clear packing tape over the paper and cardboard stacks. Now I have a spacer to use with the GSII battery for taking up the extra space. The cardboard I used was ~.06" thick, the paper was ~.010" thick, and the glue was super glue. I cut strips ~2" long x .2" wide and stacked 6 of them for the bottom spacer and 5 of them for the side spacer.
See the pics for more clarity.
Ha ha i was coming on to check for something like this. Does the note battery work on the gs2 as wrll?
*ok i jumped the gun without looking at pics my bad.
Would have been insane battery life for the gs2 if it did tho.
Sent from my GT-N7000 using xda premium
Do you guys know where one could pick up extra GNote batteries? Possibly a charger that can externally charge the battery?
Spartan2x said:
Do you guys know where one could pick up extra GNote batteries? Possibly a charger that can externally charge the battery?
Click to expand...
Click to collapse
Get the iCruiser with 11000mAh http://amzn.com/B003ZBZ64Q
Nice find! A nice method to use until cheap spare batteries can be found.
Sent from my Samsung Galaxy S2 using XDA Premium App
nbass668 said:
Get the iCruiser with 11000mAh http://amzn.com/B003ZBZ64Q
Click to expand...
Click to collapse
agree...I use this one and it works great, better than carrying an extra battery and changing the batteries:
http://www.energizerpowerpacks.com/au/products/xp4001/
Back in my Pre-iPhone days I used to just keep a charged battery in my car for those longer days. After a while it may have only had 60% left(since I did not need it everyday), but that's enough just to hold you over when your first battery is abut to die! That's how I use my Mophie Air Case right now....I HATE those external batteries you have to plug up(like the one linked to above). If its going to be like that, I want it in a case so I can still pocket the damn thing(like the mophie).
I found extra Note battery's!
http://www.expansys-usa.com/samsung-original-battery-for-galaxy-note-5-3-224752/

Anyone getting a portable battery pack?

I usually get a few ebay batteries for my phone when i'm travelling but it seems that won't be the case this time around with the Nexus 4. Next option would be to pick up a portable battery charger. Any recommendations for one preferably with a built in concealable cable?
Something like this one but larger capacity: http://www.amazon.com/SlimTalk-Exte...TF8&colid=3JV3M6BBIVSNO&coliid=I3SU5TRGE8UZYR
I already have this one, it seems to work really well and will charge my Ipad, Nexus 7 and phones.
http://www.amazon.com/gp/product/B0073F92OK/ref=oh_details_o06_s00_i01
qnet said:
I already have this one, it seems to work really well and will charge my Ipad, Nexus 7 and phones.
http://www.amazon.com/gp/product/B0073F92OK/ref=oh_details_o06_s00_i01
Click to expand...
Click to collapse
This is what I've got as well, it's pretty compact and easy to carry, plus the torch can come in handy at times too. Before that I had a 5000mAh Pebble, which was actually not that much smaller, and was a bit more of a nuisance because it didn't use microUSB to charge itself (instead opting for some weird tiny barrel connector).
I plan on getting one of these (the 10,000 Mah variant )
http://www.amazon.com/5600mAh-Exter...&qid=1351732273&sr=1-3&keywords=anker+battery
I may buy one later on. Until then I plan on making a solar charger for my car.
jnewman1991 said:
I may buy one later on. Until then I plan on making a solar charger for my car.
Click to expand...
Click to collapse
Please tell me more!
Slap-Yourself :) said:
Please tell me more!
Click to expand...
Click to collapse
It's nothing really special. If you search for DIY solar usb charger there are quite a few instructions on how to do it for pretty cheap.
jnewman1991 said:
It's nothing really special. If you search for DIY solar usb charger there are quite a few instructions on how to do it for pretty cheap.
Click to expand...
Click to collapse
Wow thats great! shuld try this out. thanks!
Mophie and powerskin would make a lot off this phone
Sent from my Galaxy Nexus using Tapatalk 2
tracerit said:
I usually get a few ebay batteries for my phone when i'm travelling but it seems that won't be the case this time around with the Nexus 4. Next option would be to pick up a portable battery charger. Any recommendations for one preferably with a built in concealable cable?
Something like this one but larger capacity: http://www.amazon.com/SlimTalk-Exte...TF8&colid=3JV3M6BBIVSNO&coliid=I3SU5TRGE8UZYR
Click to expand...
Click to collapse
qnet said:
I already have this one, it seems to work really well and will charge my Ipad, Nexus 7 and phones.
http://www.amazon.com/gp/product/B0073F92OK/ref=oh_details_o06_s00_i01
Click to expand...
Click to collapse
I have both of these. The one the OP is looking at doesn't last nearly as long as the MFG claims it does. The second one is great for the two settings 0.6 and 2.0 amps. The weird thing is that my N7 won't charge on the 2.0 amp setting. I have to connect it to the 0.6 amp setting. And the brand on mine is Anker. I like the latter better, tho you have to have a usb cable. Actually, now that I am thinking about it, it comes with some small cables and various connectors for different devices.
http://bensoutlet.com/products/anker-astro2-8400
35 bucks for a 8400 mah isnt bad.
ElectroBeijing said:
I plan on getting one of these (the 10,000 Mah variant )
http://www.amazon.com/5600mAh-Exter...&qid=1351732273&sr=1-3&keywords=anker+battery
Click to expand...
Click to collapse
I've got this coming in the mail right now
I might pick up the 8400 anker if it seems necessary after a few weeks of use.
I'm planning to get one if there is inductive charging build into the case with 7-10k mAh
bfspider said:
I might pick up the 8400 anker if it seems necessary after a few weeks of use.
Click to expand...
Click to collapse
Yes that's what I use for my nexus 7,phone and ipod. Very very useful. :thumbup:
Sent from my HTC Vision using xda premium
Can't wait until they build one of these with wireless charging built in. THEN I'll buy one
I just bought this one - check around for some coupon codes to get an additional $5 off. I liked the look of the Zagg sparq series and the ability to plug it in (no more carrying around an ac adapter) but the build quality is questionable and the price is too high!
What about this one http://www.amazon.com/New-Trent-IMP120D-Thunderbolt-Blackberry/dp/B003ZBZ64Q/ref=pd_cp_cps_3
It's a 12000 mAh.
I just ordered one of these 12000mAh from China off ebay:
http://www.ebay.com/itm/12000mAh-Ex...444570?pt=PDA_Accessories&hash=item5d358dcf1a
I didn't buy from this particular seller and I haven't used it yet, so I can't recommend anything about it. (A bunch of sellers sell the same item.)
The marketing material seems legit and the price is good. I'll see if I made the right decision.
The width and height happens to be about the same as the S3 and N4. They claim an efficiency of 90% with the lithium polymer batteries. I would be happy if the N4 required one or two charges to get through an evening out and if this "power bank" could deliver ~4 charges.
The question is, how do you use these things? In the pocket, without an inductive Qi charger of the right size, i don't seem myself charging it with the cable in pocket regularly. It makes it a hassle to pull the phone out of the pocket and use. I see myself charging or powering the phone with it if I find myself sitting down for 10 mins or more, say at a meal.
How are you all planning to use an external battery brick?
yes, portable battery pack is required if you are high end user, playing high end games... I already have one

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