Review of ZeroLemon 9300 mAh extended battery for Note 2 w/pics!!!Tips


  1. twister6

    twister6 Guides Guide

    This is a review of ZeroLemon 9300 mAh extended battery for Note 2: ZeroLemon

    When life gives you lemons - you make lemonade. When life gives you ZeroLemon 9300 mAh extended battery - you put it in the charger for 12 hours prior to initial use :) The long anticipated 9300 mAh extended battery for Note 2 is here!!! And for $39.99 including TPU case - you are getting a triple capacity of Samsung OEM 3100 mAh battery. This is a first part of my review where I will go over the battery, the case, the fitment, and comparison details. Due to capacity of this battery and requirement of a few charge cycles, the performance part of the review will follow in a few days. I'm also planning to use my VA battery monitor setup to measure externally the exact capacity of this battery.

    So let's start with dimensions to give you an idea of how triple capacity translates into footprint increase. Just for the reference, original Samsung OEM 3100 mAh battery is 75 mm x 56 mm x 5.6 mm (2.95" x 2.18" x 0.22") and weight of 54g (1.9oz). The new ZL9300 is 110.8 mm x 71.6 mm x 6.2 mm (thinner side) / 12.9 mm (stacked up side) -> 4.36" x 2.82" x 0.24" (thin) / 0.5" (thicker side). The weight of ZL9300 is 166g (5.9oz), and together with TPU case your Note 2 will clock in at 330g (11.7oz). It obviously makes phone heavier and beefier in your hand, but dimensions with TPU cases are as thick/wide as Defender and length wise even shorter. I use Defender as a comparison also for a reason since this case is a very popular mod for extended batteries, and I'm planning to modify my "real" Defender for that purpose. Comparison pictures included below.

    Now to the battery itself. It looks like a regular size battery stacked on top of a longer thinner plate which most like host 2/3 of the total capacity. As I mentioned above, verification of capacity will take time since we are dealing with 9300 mAh battery where charging and discharging (use) takes time hopefully measured in days (for use) rather than hours. In this particular case due to its dimensions it obviously makes no sense to have battery cover - as a matter of fact it would have been impossible to include cover. Instead, ZeroLemon designed TPU case that serves a purpose of both battery cover and some basic protection. Unfortunately, NFC is not included. The case itself is made out of typical semi-rigid material and has a very nice fitment with a phone, although you do get some pulling around sides typical for TPU material. The history of this ZL9300 release is that battery was available awhile ago but initial batch of TPU cases was loose, so the decision was made to delay the release in order to fix the problem and to deliver 100% finished product. The finish of TPU case is matte with a nice non-slip grippy texture that feels good in your hand and will provide some friction on the surface. Very important since due to increased size and weight you would want to have a better grip. It also offers edge/lip for a screen protection when placed down but I wish it would have been bigger. As a bare minimum it will work, but for example in my case where I use tempered glass on my screen - the lip is almost the same depth as a thickness of my tempered glass protector. If I place it down on the flat surface I might have a micron of clearance, but this problem is ONLY in my case because I use a thick tempered glass protector. For anybody with a typical PET film protector you should have more clearance. All the port openings are perfectly aligned, from micro-usb port, to s-pen opening, mic, headphone, camera and flash opening (partitioned in a nice way). I have to mention about the speaker in the back - since TPU cover will not be flush with a speaker, inside of the case there is a partition to isolate and direct sound to speaker cutout in TPU case. Nice design detail! Power and volume up/down buttons are separated and easy to press with a nice tactile feedback.

    As a bare minimum this TPU case is pretty good considering you are getting a decent grip and basic protection right out of the box. Also, ZeroLemon made clear they are working on a rugged case to be available sometime during the summer. This is a huge plus!!! Of course, for those who can't wait, you can always do a popular Defender case mode to cut out back panel of it's inner plastic shelf and use external rubber layer on top. I will plan to do it myself as well. Furthermore, if you are curious about using this case in the car, I confirmed and included pictures of Arkon mega-grip mount to work perfectly with it. The only other comment I have is that I hope ZeroLemon will consider making an external battery charger for ZL9300. Typically you would want to charge this battery overnight, but if you run out of "lemon" juice during the day - if you swap with another battery, you don't have other way to charge this extended battery, unless you find some off-the shelf charger (and even those are typically 350mA-500mA that take forever).

    Right now, I'm putting my battery on the charger and will keep it for awhile before I'm going to start doing my testing. But in a meantime, enjoy these pictures:

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  2. twister6

    twister6 Guides Guide

    I'm still running stress test to drain down the battery. Received it yesterday, was at 60% from the box. Charged it up to 100% and then kept it on for another 5hr even after green light indicator went on. I can't sit all day and use it continuously, so I'm running Nova Battery Tester benchmark app. As I mentioned before, it doesn't provide the exact accurate reading of the mAh, but does it's calculation by running a very CPU-intense stress test at full max brightness and everything on (except 4G) for about 2hr at a time while monitoring battery discharge. This is more vigorous than a regular use and I already ran 6 full cycles with battery down to 35% now. I will continue running it down to 2% or so. What I found is that reported mAh capacity is showing consistently 3x or more the capacity of my stock battery I ran under the same test conditions. Doesn't matter mAh reading, it's a relative test and for sure - this ZeroLemon 9300 mAh is at least 3x times the capacity of our stock Samsung 3100 mAh battery!

    Here is a screen shot with Nova Batt Tester results so you can see my latest tests with ZL showing triple capacity in comparison to previous stock batt results. Once I drain my battery with Nova stress test, I will post a final screen shot of total battery run time and screen-on time.

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    Furthermore, I confirmed that ZeroLemon TPU case DOES fit Seidio CONVERT holster. It's not a tight fit, but since CONVERT has a spring-loaded latch which can also be locked, you can definitely use it with a good piece of mind. Here are pictures:

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    OK, now here is a scoop on Defender mod for ZeroLemon 9300 mAh battery. Yes, I did it, and No, I'm not too crazy about it. I was using a wireless dremel tool holding back panel of the inner plastic case in my hand while drilling with another hand. So, it was all up in the air. I could have done a better job if I had it fixed on the table. It fits for sure, but will take a little time for an outer rubber shell to stretch, I guess. As of now, power button is not easy to push, and only up volume works as expected while down volume I have to press by pushing on the case from behind the button since its not aligned perfectly. For sure, this mod will give you more protection than original TPU case from ZeroLemon, especially higher lip around the screen. And you can also use Defender holster with it, but overall it adds more bulk and fitment is not as seamless. Personally, I will give it a day or two to see how it will stretch (and keep in mind, I'm using HK version of Defender), and then will go to original TPU case. Of course, will be anxiously waiting for ZL new rugged case they are working on due this summer!!!

    Here are the pictures of my ZL-Defender mod:

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    With Defender holster, it only fits face in (and a tight fit) and NOT face out:

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    .... and here is a final result of Screen-on time!!! We are talking about 20 hours of screen time with 9% still remaining!!! And, I'm not talking about 20 hours (out of 36 hours after full battery charge) of keeping screen on with some light use. About 14 hours of that time was running Nova Battery Test cpu stress test at max brightness and gps/bt on. Pure monster power!

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    TexasEdition and rivera02 like this.
  3. Veritas4420

    Veritas4420 Well-Known Member

    Just got mine as well! Still kinda irked about the no NFC, but I might be picking up the mugen also. I was very surprised at how big the battery was, but I figure it's three normal batteries with two stacked.

    Attached Files:

  4. twister6

    twister6 Guides Guide

    If I would have a spare NFC (might have to pick up off ebay with a spare battery door), there is probably a way to run ribbon wires from connector points to NFC card taped to the back of the TPU case. Regarding Mugen, sorry can't justify double capacity for $105 when you can get the same double capacity battery from Anker for $17. Extra money for plastic battery cover with a kickstand and no case - have no idea how Mugen can justify the difference. Or here with ZeroLemon for $40 you get triple capacity battery with TPU case.
  5. Veritas4420

    Veritas4420 Well-Known Member

    Oh yeah, I'd never pay 105 for the mugen. I've been looking on Craigslist and eBay for cheaper.
  6. ScandaLeX

    ScandaLeX Wasn't Me Guide

    Twister I need a favor. In one of your post there was a link to this battery on Amazon but the description said WHITE case.
    I don't know if you purchased this battery or if they sent it to you for review but is it possible to find out 2 things


    1. When will the white case be available (I detest black)?
    2. What other cases (other than Zero) fit with this battery?
  7. twister6

    twister6 Guides Guide

    I know it's confusing. I guess original plan was to have both white and black TPU cases. Very early review sample from that other link had a white TPU case, although with a poor fitment. ZL went back to redesign TPU case while holding off battery release, but only black TPU case was released. I don't have info yet about availability of the white case, will ping them again with a question.

    Due to its unique size/shape, no other case will fit this battery. I even tried using ACTIVE Extended (the one Seidio makes for their Innocell battery) and it doesn't fit. The best bet, and already confirmed by others, to modify Defender where you cut out back of the inner plastic shell to fit this battery. And even with that mod I heard outer rubber shell fitment is very tight. Depending on free time, I'm probably going to do this mod today and will post pictures/comments.
  8. twister6

    twister6 Guides Guide

    Got confirmation, white TPU case version will be released in 2 weeks.
    TexasEdition and ScandaLeX like this.
  9. twister6

    twister6 Guides Guide

    Big update in #2 post from the top of the original post with info about Capacity, Fitment with CONVERT holster, and Defender mod. Check it out!!!
  10. twister6

    twister6 Guides Guide

    2nd Post with Defender mod is updated with Defender Holster pictures. Fits only face in (very tight), but NOT face out.
  11. twister6

    twister6 Guides Guide

    Refresh and/or clear cache always does the trick ;)
  12. twister6

    twister6 Guides Guide

    Final update in Post #2, pretty much I was able to squeeze 20hr out of this battery with 9% still remaining, and we are talking about high intense stress test running for 14hr out of those 20, while the rest watching movies, using as GPS, browsing, etc.

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    rivera02 likes this.
  13. ScandaLeX

    ScandaLeX Wasn't Me Guide

    Thanks Twist for white info!!!!

    Now, I see you got 76% of screen usage. Did you click it to see what the hours of on screen time was?
  14. twister6

    twister6 Guides Guide

    Yes, I posted it already right above that screen shot with another screen capture where I clicked on screen usage to show you I got 20 hours of screen time (and 14 hours of that time was running cpu intense stress test at full brightness).
  15. Veritas4420

    Veritas4420 Well-Known Member


    So per Amazon the batteries are now unavailable?
  16. twister6

    twister6 Guides Guide

    Looks like sold sold out atm :( Probably expected with such high demand, but I'm sure they will have more in stock soon. The usual supply/demand hype of a new product :)
  17. Veritas4420

    Veritas4420 Well-Known Member

    Aw, I wasn't sure. Most of the time if Amazon is sold out I've seen them put a date when they will be available. Was really hoping they saw that NFC would have made the battery almost a must have. Got my hopes up lol.
  18. twister6

    twister6 Guides Guide

    Sorry, no NFC :(

    Here is a quote from ZL reply about NFC: "For NFC support, we have no plans on that so far as the material cost is too high to implement NFC to this (requires a special NFC design which we find too expensive)".
  19. srad2drag

    srad2drag Well-Known Member

    I received my ZeroLemon on the 19th. It really is a beast of a battery. I ordered a Seidio Active belt clip to holster my phone while it's installed. I'm currently using the seidio surface belt clip with my Hyperion extended battery with no problems.. I hoped that I could squeeze the ZeroLemon into that but no joy.
  20. Veritas4420

    Veritas4420 Well-Known Member

    So far so good.

    Attached Files:

  21. ScandaLeX

    ScandaLeX Wasn't Me Guide

    Screen on time of 13 hrs is beyond impressive!!!!
  22. Veritas4420

    Veritas4420 Well-Known Member

    I tried very hard to get the battery down. Great battery so far. Worth 39.99 any day.
  23. twister6

    twister6 Guides Guide

    Absolutely, but that 20 hrs I squeezed out of it with 9% left, from the screen shot I posted a few messages above - is beyond impressive!!!
  24. ScandaLeX

    ScandaLeX Wasn't Me Guide

    I did it again. Missed the 20; just scrolled back up & saw it. You go boy!!!!
    PLEASE keep me posted about the white case. Wish it can with a kickstand but I already know I am not going to mod a case.
  25. twister6

    twister6 Guides Guide

    I'm keeping my fingers crossed ZL will have something with kickstand for their rugged case. For now I don't have any details, but obviously will test/review it as soon as I get my hands on it :) Also, as I mentioned before, they are looking into fast charging external charger for this monster battery.

    Btw, I read a report about someone running a test using R/C battery analyzer, and they measured this battery to be exactly 9347 mAh.
    ScandaLeX likes this.
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