The Galaxy S III has a capacity of 2100 milliamp hours. As far as battery life goes, it's alright, when compared to other flagship phones from last year. But if you want the absolute best longevity out there, not to mention the best bang for your battery buck, you've got to check out the off-brand expanded model that Reddit found while trawling the depths of Amazon.

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It's got a capacity of 7000mAh. Look at that number again: 7000. That's more than three times the capacity of the standard battery, double most of the existing extended batteries, and (as it happens) the same amount of juice that goes into Samsung's current crop of 10-inch tablets. It's much, much more than you'll get out of any RAZR, MAXX or otherwise. It's quite possibly the biggest Galaxy S III battery that money can buy. Of course, the extended battery pack gives your phone the size, weight, and density of a curvaceous brick. But it's a brick that can last a week on a single charge.

Here's a pretty good video overview, done by the folks at Smoking Android:

And not a lot of money, as it turns out. The ZeroLemon battery is a mere $33.99 on Amazon at the moment, complete with a black TPU replacement battery case and a six-month warranty. It comes in black, white, and blue, and it's even got NFC, for those who can't live without it. If all that hasn't piqued your interest, Amazon Prime customers can pick one up and score free two-day shipping.

Amazon - ZeroLemon Samsung Galaxy S III 7000mAh Extended Battery (black)

Amazon - ZeroLemon Samsung Galaxy S III 7000mAh Extended Battery (white)

Amazon - ZeroLemon Samsung Galaxy S III 7000mAh Extended Battery (blue)

Via Reddit

Jeremiah Rice
Jeremiah is a US-based blogger who bought a Nexus One the day it came out and never looked back. In his spare time he watches Star Trek, cooks eggs, and completely fails to write novels.
  • Mehmet Fatih YILDIRIM

    Why not carrying some nuclear reactor with you so you dont need recharge for centuries?

    • ickkii

      tfw I actually have a 10 watt solar panel to charge my devices in power outages.

      • http://debatesthatmatter.blogspot.com/ Tim

        My next piece of off the grid tech will be a solio cell, the bell and Howell charger does not work. I have a flashlight that I got off line that will charge from any light source. I hope portable device chargers work like this some day.

        • JG

          The thought of a flashlight being charged by other light sources brings a smile to my face... Storing all the light during the day to help you see at night....

    • http://www.facebook.com/profile.php?id=100005583823144 Anthony Evans

      because carring around a nuclear reactor on your person isnt a good idea?

      • http://twitter.com/misterE33 Mr E
        • http://debatesthatmatter.blogspot.com/ Tim

          There is a reason the Avengers did not help out during the floods they happened in New york several months about, "They are not Real!"

        • http://www.anivision.org/ Christopher Bailey (Xcom923)

          *nerd voice* Well actually Iron man isn't powered by a nuclear reactor. The Arc reactor that powers iron man is a much cleaner, more efficient and usually more stable form of energy.

        • http://www.facebook.com/profile.php?id=100005583823144 Anthony Evans

          he doesnt carry around a nuclear reactor.. thats an ARC reactor. fail

    • http://twitter.com/misterE33 Mr E

      Good idea. Could you send me an Amazon link?

  • http://www.ScienceProUSA.com SciencePro

    I don't trust the mAh rating on these batteries. Most likely it's about half what is stated

    • http://www.anivision.org/ Christopher Bailey (Xcom923)

      doesn't really matter if I can get 4 days off a charge. On top of that it has a pretty long warranty so if you don't like it you can return it. 180 days is a lot longer than most extended battery makers I've seen

    • http://www.androidpolice.com/ Artem Russakovskii

      Someone in Amazon reviews supposedly measured it and found 6510mAh, which is pretty great.

    • http://twitter.com/kryptonite_2448 Josh

      Nope, others have shown that ZeroLemon batteries actually are getting slightly more than advertised.

  • http://www.anivision.org/ Christopher Bailey (Xcom923)

    As soon as I saw this video I bought it

    • http://www.facebook.com/profile.php?id=100000003999549 Mike Harris

      I only made it halfway through before I bought it.

      • http://www.anivision.org/ Christopher Bailey (Xcom923)

        LOL completely understandable. I hit the buy button so fast I wanted to cancel it and forward it to my workplace so I could get it faster. All well, it's to late now already shipped

  • http://www.facebook.com/Sebnotic Sebastian Patino

    I've had this battery since it got released for around $26.99 on amazon. I can say, without a doubt, that it is an amazing extended battery. Some people have complained about the case that they got being loose. Mine wasn't.

    Highly recommended, A++, 10/10, etc etc.

  • Chon

    Lol, that's ridiculous. That massive battery made the SIII into a hideous phone. Whats wrong with just charging the phone up at night, or carrying an extra smaller battery.

    • http://www.anivision.org/ Christopher Bailey (Xcom923)

      Some of us don't like the "so thin you can barely hold it" way that cell phones are going. I personally feel that battery power is lacking in smartphones these days. Smartphones are becoming a "hub" if you will, for all our other devices. I wear an armband, smartwatch and I tether to my tablet via LTE so having a small battery isn't very useful. I know I'm not the normal user but either way there is a reason why many devices exist. It's because someone is willing to spend money on it

    • http://www.facebook.com/profile.php?id=100000003999549 Mike Harris

      There's nothing wrong with that. In fact, that's what I do now. I have three extra batteries fully charged, so when I know I'm going to be away from home for awhile, I slip them in my pocket. But this is an even better solution for when I know I'm going to be away for a REALLY long time. And to be honest, I'll probably still bring my extra batteries along.

      The only thing I don't like about this is that I lose my wireless charging ability, but like I said, I'll only need to use it on rare occasions.

  • WrlsFanatic

    It looks like it blocks the camera. Can you verify if it shows up in pictures?

    • schramm

      I've used it since it came out...it blocks nothing!! Not camera, sound, or flash! Outstanding battery...period!!!

      • Maher Salti

        whats the charging time?

  • http://twitter.com/wade_county John P

    I see your 7000mAh and raise you 9300mAh.
    the apocalypse phone http://youtu.be/JMtFAScoKuk

    • http://www.anivision.org/ Christopher Bailey (Xcom923)

      yeah...but that's for a GN2 which has more space

    • http://www.androidpolice.com/ Artem Russakovskii

      That battery isn't out yet (it's due April 15th - I just emailed the company), but we'll post a note when it's live. Absolutely MASSIVE.

    • Zaatour36

      Thanks for the heads up!

      That's for GN2, and its awesome because it will be perfect for my GN2:-)

  • Ronny

    I really like the thinness of current-times phones, and found that buying a cheap extra (normal size) battery is better for me. I simply carry another one in my bag, and when one dies, I plug in the other. I was NEVER in a situation where I needed more than these two. I'm not traveling that much, but when I do, that one extra battery is all I need.

    • http://www.anivision.org/ Christopher Bailey (Xcom923)

      I think something like this would be perfect for heavy use. For example tethering or multi-device bluetooth connections. Or remote desktops I'm really excited to see this actually I was thinking about a battery like this but I wanted a protective case (which are limited when you have an extended battery) and I wanted NFC. Since this covered both points AND was super cheap I snagged on up immediately.

  • http://twitter.com/kryptonite_2448 Josh

    I've also had this since it was released, and paid $27. To me, it's worth every penny. I give my phone pretty heavy use and can easily make it on 48 hours. Just seems like the thing just won't die.

    • dogulas

      Have you noticed the phone being warmer/hotter since using this huge battery and the case? Seems like it would create more heat with that battery and insulate it in as well. At this price I am trying to think of any real negatives (I don't care about the added bulk).

      • http://twitter.com/kryptonite_2448 Josh

        I think it may run just slightly warmer, but that could be because I have the brightness turned all the way up and not afraid to use the screen 24/7 now. Before I'd have it time out quickly and brightness lower to save battery.

  • alexcue

    I have had this battery for a little over a month, and it is awesome. As some of the other commenters said, I actually prefer a thicker design, especially for holding in landscape. Here are a few screenshots I took after a full discharge: http://imgur.com/a/q2gCH#0

    That 6h screen-on time was at max brightness the entire time. Overall, the only gripe I have is that it blocks the microSD card; you have to remove the battery to access it. It does not block the camera in any way or the flash or speaker.

    I haven't done testing to see whether the additional battery interferes with WiFi or 4G reception, but it certainly hasn't been bad enough to note if there *has* been any. I don't wear skinny jeans or anything, but it fits in my front pocket just fine.

    Downsides for me:

    I don't mind the TPU cover/backplate solution, but it doesn't work well with my PuGoo stuff (which AP has reviewed in the past). It also prevents me from using my universal car mount; the gripper tines aren't long enough to get around its bulk. I never had a case or anything for my S3 before this, and it can sometimes get in the way of edge gestures (I use SwipePad and GMD Gesture Control).

    Overall, I love this for situations when you know you'll be using the hell out of your phone, like day trips with lots of photos, GPS, internet, tethering, etc. The standard battery will get you through a day, but this will get you through a long weekend just fine. Great for power users (ha) and people with Fear Of Battery Running Out. As a former FOBRO, and someone who (still!) pockets a USB cable somewhat regularly, this battery has provided peace of mind.

    • http://www.facebook.com/wraithevolution Brady Lane

      I'm using this battery as well and love it. As for your car mount issue, I have a solution for you. Check out the iMagnet mount on Amazon. It's the best mount I've ever used, hands down and it works perfect with the zerolemon setup.

      • alexcue

        No shit, that looks pretty awesome! Does the magnet affect the phone at all? Like, GPS, LTE signal, etc? Ever have any issues with the magnet not being strong enough to hold on a bumpy road or anything?

    • dogulas

      Have you noticed your phone getting warmer/hotter because of this huge battery and case? Seems like they would act as a major insulator. I wonder if a few well-placed holes in the case would provide some needed ventilation to let that huge battery cool off better.

      • alexcue

        I haven't noticed my phone running any warmer. I had someone ask me the same question on my Amazon review, so I will be running an app to log my battery temp throughout the day. I don't expect to see much additional heat, but who knows.

  • http://debatesthatmatter.blogspot.com/ Tim

    Would love to get this but what if you paid for a good case to protect your phone? I carry my zagg spark with me when out but I think we have the tech to make a battery that would fit into a standard smartphone package. Extra battery power is good but if you drop it, it's a wrap! The best of both worlds should not be a choice.

    • Jesse Turner

      I know what you mean, I've been looking around for a flip case with a stand of some sort but I'm kinda in the dark on if any case other than a zerolemon's would even fit when the batteries inside.

  • http://debatesthatmatter.blogspot.com/ Tim

    I do know they offer, batteries for the S2 with a bit more juice in them that also fits in it's current form factor without increasing the size. I was actually going to purchase one before I got my S3 I9305 international. All I have to do is wait a bit longer and I am sure one will turn up. However, the battery life with this product is insane.

    • http://www.facebook.com/profile.php?id=1501675804 Jake Lee

      I have the official Samsung extended battery. It replaces the back case, but the difference isn't too major, and I prefer having a flat back to the bottom sticking out. Old cases (at least my silicon one) still fit perfectly, and it lasts significantly longer. Well worth the purchase.

  • GraveUypo

    how thick is it? if it's under twice the thickness of the regular thing it's totally worth it

  • Domenico Eufemia

    Won't ship to my address in Canada :( sad panda

  • Gabriel Ionescu

    How about the same thing for the Samsung galaxy note2?

  • biggerguysf

    Thanks for the notice!!!! Got one in white right away.

  • TylerChappell

    I got this battery for my dad's Galaxy S3 in the black a few weeks ago when it was $25.
    Back then it was also 6300mAh instead of 7000.
    I re-ordered him a blue 7000mAh one and he loves it, it lasts 4 days, and the only minor issue is that the TPU case fits snugly enough that it may interfere with a screen protector if you use one, but this is by far the best battery out there for the Galaxy S3.
    Not only that, it is actually less bulky than a GNex with a Seidio 3800mAh battery and Seidio kickstand case.

  • Joshua Percell

    I got a 20000 (yes, that is the right number of zeros) mAh external battery for $27 on eBay. And I saw some that were cheaper.

    • SetiroN

      It's easy to inflate the numbers.
      I've bought a 12000 power pack that in reality barely exceeds 4000. And it's cumbersome as hell.

      • Joshua Percell

        I see your point. But I'm pretty sure it's 20k.

  • Tony Bullock

    £21.99 on Amazon UK. Imagine it would be great long car journeys using GPS and streaming radio... Might have to get one. Probably won't fit in my car cradle or case though.

    • ElfirBFG

      Yeah, that or a car charger/dock...

    • Göran Sävström

      Amazon UK is also where I went when I found out that amazon.com won't ship this one to Spain. Too bad Amazon UK don't sell the White one though...

      • http://twitter.com/mrkud MrKud

        Thats wired, they just shipped one to Poland so should be the same for u.

  • Damenc

    And of course, not available to Canadians.. *sigh.

  • http://www.facebook.com/michael.portner.3 Michael Portner

    Because of the way I use my SIII, I need the otterbox to protect it. I don't know how that would work for . Any answers? Someone mentioned if it drops - - - goodbye battery. I'm not sure if it's ready for prime time.

  • Christopher Theofilaktos

    Doesn't ship to Australia :(.

  • Magnus100

    The battery make the phone way too thick. It absolutely defeats the purpose of carrying a phone for me. You could as well log a car battery about. They need to develop phone battery technology so that we can go a week without recharging

    • smeddy

      I have a 5000 battery in my Note and actually it makes it easier to hold for me, and no less portable. And then I get two days usage

  • JG

    Too bad it isn't a "one-size-fits-all-phones" deal.... I'm really needing a new battery (phone use to last 18+hrs, now I'm lucky to get 4-6)...

    • T Wilson

      You do know that the s4 has a different look in the back

      • JG

        I didn't... But I do now :) Kind of focused on the X Phone as the primary likely replacement (figure Droid X being replaced by X Phone). Thought they might have done an iPhone type upgrade, kept the form factor mostly identical, just gave it a faster processor, more RAM, etc...

  • http://twitter.com/jackburtonHERO jackburtonHERO

    I was thinking about purchasing the official S3 extended battery just last week. I'm glad I waited!

  • kunnal

    I think Nokia should start a battery division. They had the best and the longest lasting batteries, until the touch-screens took over!

    In the meanwhile, I read one for the Note II is going to be out soon. That's a win!

  • flosserelli

    Is that a phone or a stealth aircraft carrier

  • Bruce N Cheesman

    How BIG is it and what does it do to the phones profile? I bought nott 1 but 2 backup batteries that I can use to switch out once charged/depleted. a bargin at $39.99 each. Not, but I can use the S III as it was intended (awesome) and not limit its WiFi, GPS & Bluetooth capabilities.

    • T Wilson

      I have no issues with wifi, gps, bluetooth or overheating

  • Maher Salti

    So what is the charging time with a standard Samsung charger?

    • T Wilson

      7 hours for recharging, 12 initially

  • Jared Busch

    Hey everyone! So I see a lot of people disappointed that ZeroLemon isn't available outside the US. I've spoken with the owner, they've informed me that although at this time they only have a store on the US Amazon site, they are currently working on an Amazon UK site. Also, if you email them directly, which they are very good at responding to, they will figure out a way to get the battery to you, whether you're in Canada or the UK =)

    -TheSmokingAndroid ;)

  • Shane

    A total of 5 minutes went by between seeing this article linked in my email, watching a bit of the video, and clicking the button to purchase through Amazon. I can't wait to get this thing!

  • SoWhy

    Can anyone tell me how much the S3 actually weighs when using this battery?

  • vittorio nicosia

    Hope they make it available in Italy!!

  • http://www.facebook.com/ashshejale Ashish ‘Einsty’ Shejale

    I wish there was a flap like thing (that protects the screen) that goes with the juicer or the battery extender because I am a little rough user and conscious that my screen might have scratches. Other than that this is great.

  • Seanzky

    No longer available.

  • Djnott

    Battery sounds great, love the link to amazon. But they say unavailable. Thanks for nothing.

  • kurt

    And why don't you ship to australia? is it the geo blocking the government has put in place to force us to pay high prices?

  • Jordan

    What kind of charger is recommended for a battery like this?
    Could I get a link if possible?

  • steve black

    Will this be compatible with a Galaxy S SPH D700?

  • Nicole

    This battery works amazingly, except the fact that it can interfere with the phone's signal and thus cause calls to CONSTANTLY be dropped.

  • Gert van Lingen

    I bought this batt as well, just started charging it (drained it yesterday). Can anybody tell me what the normal elapsed charging time is?

  • josie

    I have a question, what is the right percentage to discharge and charge the samsung battery?

    • GraveUypo

      when the low battery warning hits is a good time.

      just don't let it go completely flat for long.

  • Wayne Grazio

    I have one. I charge my phone once every three days. I can watch videos in the gym, listen to music, and text to my heart's content. I've had one for 8 months now, no issues other than me looking to see I don't need to charge my phone over and over.