Develop Bugs

Cheap 3500 mAh battery ebay

http://cgi.ebay.com/3500mAH-Sprint-HTC-EVO-4G-Extended-Battery-Door-B-/170545479525?pt=PDA_Accessories&hash=item27b54d7f65#ht_2527wt_1039
Anyone get anything like this?
Does it give the same results as the seidio battery that goes for $69.99?
Just trying to get some info before I "get what I paid for"

did you try searching first? Theres tons of threads on this battery. I love it and I think its great, I use it every day and it protects the camera lens. defiantly worth the money, forget that sedio ripoff battery unless your rich.

http://cgi.ebay.com/2X-NEW-EXTENDED...217472?pt=PDA_Accessories&hash=item43a16f0940
I got my batteries from this guy. They are amazing for the price, not as good as seido but they do hold a charge. I charge mine on the charger it comes with only after I know they are completely dead. I can tell I get about 30-40% more battery life out of them compared to stock, just make sure you cycle them a bunch once you get them. After a few complete drains and full charges they do pretty well. Well worth the money. for 10 more bucks u can get another battery and charger.

kenfly said:
http://cgi.ebay.com/3500mAH-Sprint-HTC-EVO-4G-Extended-Battery-Door-B-/170545479525?pt=PDA_Accessories&hash=item27b54d7f65#ht_2527wt_1039
Anyone get anything like this?
Does it give the same results as the seidio battery that goes for $69.99?
Just trying to get some info before I "get what I paid for"
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Click to collapse
I have 2 of these and 2 Seidios. The Seidio's are much better. (I only paid $50 and $45 (one was used from someone with an Incredible on eBay, really is exactly the same battery tho).
The Seidio's have been tested at batteryboss.org to actually be around 2800mAh, which is still about 90% better than stock battery.
After using the 3500mAh Chinese ones, I get the feeling they are actually more around 2100-2150mAh (just my guess, won't know for sure until batteryboss tests them), which is only about 40% better than stock.

Lots of info on the ebay batteries all around. I have the 3000mah and love it. I can finally go all day without charging my phone. I dont even have to think about my battery any more because no matter what it wont be dead before I'm going to bed at night. It would be nearing dead before around lunch time sometimes.
From what I have read though, is that all of these ebay batteries are just 2600mah batteries with different stickers on them....Either way, it last me longer than what I need it to, so I am very happy with it.

Do the 2700, 3000, 3200, and 3500mAH batteries on eBay all seem to come with the same rear cover and make the Evo equally thick, or are the smaller batteries a little bit thinner than the largest ones and sold with slightly lower-profile covers?

Is there a way to buy these for that price without ebay? I got banned over $10. I looked around the cheapest I could find was $50.

phatmanxxl said:
Is there a way to buy these for that price without ebay? I got banned over $10. I looked around the cheapest I could find was $50.
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http://www.amazon.com/HTC-Evo-4G-Pr...NJPC/ref=sr_1_6?ie=UTF8&qid=1286423947&sr=8-6
This is what the MAH seems around, on ebay this would prob be 10 bucks but since you got banned this was the cheapest i found. I wonder if anyone has tried using these back covers with the seidio battery. I bought the 3500mah ebay battery they just have a higher mah sticker on them but i will post results after 5 or 6 full discharge cycles.

bitbang3r said:
Do the 2700, 3000, 3200, and 3500mAH batteries on eBay all seem to come with the same rear cover and make the Evo equally thick, or are the smaller batteries a little bit thinner than the largest ones and sold with slightly lower-profile covers?
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So far, there are two extended battery backs: the Seidio and the "Chinese". I've not seen any others.

I saw those on Amazon, they have a couple of 3500's for 40+shipping. Ill probably just pick up one of those. Thanks.

phatmanxxl said:
I saw those on Amazon, they have a couple of 3500's for 40+shipping. Ill probably just pick up one of those. Thanks.
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With the battery conditioned 3 times so far, I am at 72% as we speak. I have been using moderate use with 3g enabled synce full volume and medium brightness. I have been surfing the web and I have sent out about 50 texts. Made around 5 3 minutes calls. These battery's seem to be worth the money if you don't want to spend 60 dollars. I have 2 of these batteries and 1 of them is really good and the other one is so so. The good one is the one I am using now, I am guessing it is around 2100-2500mah not close to seido bat a LOT cheaper with a better back cover. I will post pics when this thing actually dies. I am at 5 hours of awake time and 18 hours of uptime with 18 hours since unplugged. I am also overclocked to 1.2ghz with a live wallpaper running the whole time . I got mine off ebay from feitong2009. Sorry for the wall of text, I just like to help people out a little.

Yea I need one cause I stream radio over 3g alot at work, I get about 3-4 hours on a charge. If I could get at least 8 or more with a fat batt, I'll be happy.

I believe they are only rated at around 2200mah...
I have one, it's alright, I don't use it... makes the phone too far for what it's worth.

Here is the battery life at the end of the day. I turned on the phone before I went to bed and put it into airplane mode. When I woke up I did moderate use through the whole day. Good enough for me.

The ones from feitong are legit. Ice had mine for about a month and a half and I'm getting about 12-18 hrs on medium to heavy usage

kenfly said:
http://cgi.ebay.com/3500mAH-Sprint-HTC-EVO-4G-Extended-Battery-Door-B-/170545479525?pt=PDA_Accessories&hash=item27b54d7f65#ht_2527wt_1039
Anyone get anything like this?
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Click to collapse
Yeah, I ordered one. For $10 - why not? I'll post back my thoughts after I receive and try it out for a bit.

For those who can't but on ebay, gorillagadget has them for $20 and obostore.com has the Yooboa(sp?) 3500mah battery with ebay back for $30. Yooboa is a well known chinese battery brand.
Swyped from my supercharged Evo!

I wonder how the Yoobao stacks up to the seidio. Prob the same as the 10 dollar battery's.

I imagine it is slightly better than the ebay batteries yet still slightly under the Seidio. There is a very small difference in between them all though. All of these batteries should be within $10 of each other. Its just crazy that the Seidio is so much when it just barely out last the ebay batteries....

fast2049 said:
I wonder how the Yoobao stacks up to the seidio. Prob the same as the 10 dollar battery's.
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I have the yoobao battery with the external charger from the obostore. I get 2 days of moderate to heavy use. The most i have got was 83 hours from light to moderate use. I'm running Freshes rom. Theirs a big difference in the battery life if you use the external charger.

i9003 Mugen 1700mah battery for Vibrant.

Just bought one of these intending to replace my stock 1500mah battery. $42 and free shipping from Mugen's website. Will let you all know if it delivers!
http://www.mugen-power-batteries.co...ended-battery-for-samsung-galaxy-s-i9003.html

kaintfm said:
Just bought one of these intending to replace my stock 1500mah battery. $42 and free shipping from Mugen's website. Will let you all know if it delivers!
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What is the difference between the batteries in our phone and the 9003 ? Mugen has a 1600 listed for our phones.
Let us know if it fits . Thanks .

Oh sweet man please let me know how it goes. I am either going to do that or get the nice big fat one with the stand

I just bought a generic 3500MAH battery for the Vibrant off Amazon for $15. No regrets so far.

You can get the Momax 1700mah battery for $17 from ioomobile or $19 from ebay. Both with free shipping
I use an original vibrant battery in my i9000 too so the momax will fit the vibrant/i9003.

Please, tell me how are your results. I want to have a battery with more capacity but using the same back case.

Just waiting on its arrival now. I looked into other brands, but kept finding massive amounts of negative reviews, like the Momax battery.
Like from this thread: http://forum.xda-developers.com/showthread.php?t=478270

I actually had the Touch HD version, which worked perfectly fine for me Which was why I had no issue buying it for the i9000. I have been getting around 40 hours from light/minimal usage on the MIUI.us rom. I am getting around 30-35 hours on the standard i9000 and vibrant batteries.
I also bought one of the cheap 3000mah ebay batteries but didn't have any luck with that. I was getting around 45-50 hours but after a few recharges it dropped to less than the original battery.
I firmly believe in "you get what you pay for" however I have to say I have not had any problems with the momax battery so far, touch wood.

Was it delivered? My battery is worse every day even with Bi-Winning v3 with Bullet kernel. It dies too quick! Using WCDMA with HSDPA is the same as seeing my battery % going down realtime.
Enviado desde mi SGH-T959 usando Tapatalk

There are a couple things you can do to stretch battery life without too much compromise.
First, go with a black background. There's a free app on the market that's easy to miss. Do a search for blackwallpaper, all one word. AMOLED screens love darker colors when it comes to battery usage.
Second, get a 2g/3g toggle and switch to 2g when you don't need data and are primarily just texting or playing games.
Pick up the Bali-X kernel. Lots of battery saving goodies in there. Afterward, pick up SetCPU and reduce the voltages as far as you can without getting crashes or "sleep of death" issues.
Now, even when gaming, my battery isn't too stressed, and when I left it off the charger overnight, after 9hrs it had burned through a miserly 4% battery.
Finally, get a retractable usb data/charging cable. Can be had for a penny plus a couple bucks shipping. Retractable means easily pocketable, so whenever it occurs to you, break it out and connect your phone into whatever PS3, TV, Computer, or Laptop is available that has a USB slot.
The battery hasn't arrived yet. Supposedly takes as much as two weeks. I'm waiting with baited breath!

Woohoo! The battery has arrived and is on the charger as I type. Will have photos and whatnot after I've gone through the initial charging and discharging.
What I can say for certain is that the I-9003 battery fits perfectly into a standard Samsung Vibrant. No issues whatsoever.

Thanks, dude, for your info! I would be going to the shop to get one if you review it positively. I think I will have the "Purchase" button under the mouse arrow!

http://www.fonearena.com/blog/41082/mugen-power-battery-review.html
http://techie-buzz.com/mobile-news/mugen-battery-review-samsung-galaxy-s-htc-desire-z.html
http://androidforums.com/htc-hero-sprint/27678-mugen-power-1800mah-review.html
Funny quote from the second review, "These third party batteries come in two flavors – one without an extended back cover and another one with a back cover, which usually adds a couple of inches thickness to the phone."
Could you imagine if it was a couple of INCHES of thickness? It'd be almost as thick as it is wide
Doing a battery drain test now. Had my phone's screen on nonstop for 2hr30min, and the battery is down to 84% (though probably slightly inaccurate still). Will see how it fairs after I've charged and discharged it a few times. No, not from 100% to 0%. From 100% to 20%. Don't want to kill my battery.

Day 2, barely used my phone today, and it's at 84% with 18hrs of time away from the charger. Screen on time of only 16 minutes. The battery is definitely lasting longer, so I think I can safely say that this is a legitimate 1700mah battery. The real test will be how well it works after a few weeks, though I have high hopes.

I've just ordered mine! It won't ship until august, the 8th.
How is it going with your battery? Doest it last noticeably more?
Enviado desde mi SGH-T959 usando Tapatalk

Just lasted over 48hrs on one charge with light use. Mostly texting and some very brief gaming and market updates. Wifi and bluetooth were on the entire time. I'm definitely seeing a noticeable improvement in battery life.
Sent from my GT-I9000 using XDA Premium App

Added link to the battery and website. I feel like the 1700mah is a little conservative on their part. It feels like I'm getting more battery than the rated 200mah difference would allow. Anyway, loving the purchase, and no issues so far. Will keep everyone posted if it suddenly bursts into flames, or bakes me a pie.
http://www.mugen-power-batteries.co...ended-battery-for-samsung-galaxy-s-i9003.html

Thanks for posting your results.
I've been having trouble getting my battery to last more than 24 hours. :/
Though the latest releases of CM7 seem to be the problem. I was getting 24 hours easily with other roms..

So this 1700mah battery fits in the vibrant with the original back cover?

burntrat said:
So this 1700mah battery fits in the vibrant with the original back cover?
Click to expand...
Click to collapse
Yep! Using the original that came with my Vibrant. Fits perfectly.

Which is a good or recommended battery for wildfire S

Hi Folks,
I recently purchased a HTC Wildfire S. I am quite disappointed by the battery performance. The dialer and android system always shows 49 % usage. Is it a bug in GB or is this normal behavior ?
I feel my battery drains out very fast in a day. I usually do a 20-30 mins of call/day. About 10-20 Mb of internet data via 2G. But at the end of the day around 8-8.30 PM my battery is almost at 25-30% or sometimes less than that. I have disabled all the vibrating notifications. Wi-Fi and bluetooth OFF, I have installed juice defender which shuts the data off when the phone is idle. Though there is some improvement after this, i still feel the battery is going down.
When googled about this, everyone had almost the same complaint. And the only suggestion was to have an extra 1500 or 1900 mAh battery. Now which is the recommended battery without making any change to the hardware etc
coz i see lot of them taking a 3500 mAh battery with extra cover and changing the contacts and all. I dont want to do all those but just to improve my battery performance. Can you help me out ?

I use this battery :
http://www.batterychampion.fr/produ...rtmentProductId/76703263/shopGroupId/95658473
I can use my device almost during 3 days without any charge : calls, sms, internet and games.

Its very large. I wanted a small phone...

The 1500mAh Replacement Battery For HTC HD7 fits the Wildfire S and gives you an approximate 20-30% boost in battery capacity.

Edit: Nvm, never bought a new battery lol

and what about 1900? any suggestion?
and btw, 1500 and 1900 battery has same sizes as the original? only the 2200 and 3500 needs a new back cover ,right?

the only extended battery worth getting is the Cameron Sino 2200mah version. Yes, it does make you phone quite a bit thicker...but it's the only one i've found that does what it's supposed to do.
I tried first a 3500mah version, but after a couple of weeks it lost it's ability to hold charge almost completely, so it was actually worse than the stock battery.
Next was the eCell 2350mah version (Gold), this didn't last much longer than the stock battery either, although it did give a litte extra, but no where near the 2x capacity of the stock, as it should have been. (i think i got like an extra hour or two oout of it)
and finally....the CS 2200mah version.....where I usually get around 8 hours tops on the stock battery (i leave things syncing every hour, quite alot of texts every day, a fair bit of internt use too), I can now use my phone for 2 full days straight, and by night-time on the second day it's finally down to around 10-15% battery left, so go mad playing games for an hour or two to really run it down to nothing, then leave it on charge over-night.
I would highly reccommend this battery, it's the only one you'll ever need, and you can actually make use of the "smart" features of your phone....I can actually use programs that need GPS without having to worry if my battery will die, leaving me stranded
it only costs around £10 on ebay.....
http://www.ebay.co.uk/itm/150696338487
the thickness is something you get used to, and some people even find it a bit more comfortable to hold....so it's not necessarily a bad thing.

A review of the Cameron Sino.
It comes as advertised.

SomeDudeOnTheNet said:
Thanks a lot for the info, I'll be buying it soon.
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Click to collapse
From my personal experiences the HD7 replacement doesn't give that boost. Maybe I got a weak unit... Soon I will order another one just to make sure.
I suggest you check this thread for comparisons between different batteries and results:
http://forum.xda-developers.com/showthread.php?t=1419930
On page 3 of that thread I show my tests and comparisons of:
HTC Stock 1230mAh
HD7 1500mAh replacement
ECell Gold 2430mAh
Thanks to d33ps1x for his great public service testing several batteries and showing us what we can expect from them. If he didn't open that thread (and others) I probably wouldn't have shared my results.
I suggest everybody take a good luck before spending their cash.

I've recently bought the 3500mah battery with black cover at FocalPrice for 6€ shipping included.
When I get the order I'll post my results.

DanHidalgo said:
I've recently bought the 3500mah battery with black cover at FocalPrice for 6€ shipping included.
When I get the order I'll post my results.
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Click to collapse
3500... i rly hope it will be that much, but it will more likely be 1700 to 2000 MAX

I thought that too but a friend bought it and told me that his phone stays on for a least 2 days without charging it.
When it arrives my home I'll post my results with pics of the difference.
Enviado desde mi HTC Wildfire S usando Tapatalk

DanHidalgo said:
I thought that too but a friend bought it and told me that his phone stays on for a least 2 days without charging it.
When it arrives my home I'll post my results with pics of the difference.
Enviado desde mi HTC Wildfire S usando Tapatalk
Click to expand...
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okay, we expect your review .. .

I got the Cameron Sino Tech 2200 mAh about a week ago.
I cant give an accurate review of the battery but I've found that its well worth the extra size for the extended life, i get a couple of days out of it now.
Its cheap as well and now I have a spare battery so if I know i'm gonna be away from a charger I can take the original battery with me.

greavous420 said:
I got the Cameron Sino Tech 2200 mAh about a week ago.
I cant give an accurate review of the battery but I've found that its well worth the extra size for the extended life, i get a couple of days out of it now.
Its cheap as well and now I have a spare battery so if I know i'm gonna be away from a charger I can take the original battery with me.
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Click to collapse
Like other people have seen (d33ps1x for example), the Cameron Sino 2200 mAh is the best bang for the buck. Even if it makes your phone "fat" it is a real power improvement.
The ECell Gold 2430mAh has barely 1600mAh inside so it's obviously false advertising when they say that they use Li-Polymer. I have one and ordered the second unit because even if it doesn't correspond to what's promised, it still gives a nice boost comparing to stock.
I'm also curious how different the two batteries can be. The second one will arrive this week. I will prepare it and test it as soon as I get it in the mail.
All those 1500mAh you can find on eBay are only marginal improvement when comparing to the stock battery. If they can provide 1300-1350mAh then you are a very lucky owner.
There are some amazing batteries out there, but they are too expensive.
I'm talking about Mugen Power Batteries:
http://www.mugen-power-batteries.com/
I had one of their batteries on my HTC Desire and it was something out of other world. If you follow their instructions (that come with the battery) you won't regret buying one. Right now the Wildfire S 1500 mAh is out of stock and will be ready for shipment on the 17th February. This means they're being produced now and who buys them will get brand new batteries, that haven't stayed for months in a warehouse. If they were cheaper I would definitely order one. If Mugen Power announces 1500mAh, they're definitely inside.

I want to buy the Cameron sino 2200 may, but will it fit a metro pcs wildfire s???

I get one or two days? I think that's good? It's longer when wifi is off.

id05dav said:
I want to buy the Cameron sino 2200 may, but will it fit a metro pcs wildfire s???
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Click to collapse
The battery will fit, but the cover will not.

chicle_11 said:
The battery will fit, but the cover will not.
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Click to collapse
I got the battery, it fits, but it's BIG! I got a soft silicone case and it works. It stretches and fits fine, it protects the phone without a back cover.
The battery is a definite improvement over the original.

Extended battery $6

I'm not sure if these batteries are any good, but not much risk if anyone wants to try them out. $4 + $2 shipping.
http://www.all4cellular.com/htc-evo-4g-extended-battery-and-battery-door-black.html
--update 1/15--
Sale isn't quite as good anymore, $6 + $2 s/h.

Try it and let us know its just 5$
Sent from my EVO 4G using Tapatalk

Don't bother. I have that same battery, it's crap. It barely lasts longer than the stock battery.

Ive been seeing those batteries around at local cell shops. I really dont feel too cozy with buying batteries like those. Wonder how good the quality is on them. My friend got one similar on ebay a while back ago but he regularly switches over from that one to the stock battery for some odd reason.

Yeah they are okay and will last you longer then your stock, but life wise they will live a short life and be prone to overheating and possibly even exploding. That price sounds like its to good to be true only because it is. Spend the extra money and get a sprint or seidio battery which will actually last you.

I got one of those, has to go through 5 charge cycles before it has the added kick... I don't mind the fact that it is a cheap one, all I care is that it lasts longer than the stock one... if it has a shorter life than the $50 ones, I don't care, I can just buy another one.

stevovanburen said:
Yeah they are okay and will last you longer then your stock, but life wise they will live a short life and be prone to overheating and possibly even exploding. That price sounds like its to good to be true only because it is. Spend the extra money and get a sprint or seidio battery which will actually last you.
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I bought these batteries but I found it much more relaxing to walk around with 2 M80's is each pocket.

Looks like the one I got from Amazon http://www.amazon.com/4G-3500mAh-Ex...Y68C/ref=sr_1_1?ie=UTF8&qid=1328647358&sr=8-1
Getting worse and worse after each charge, no barely lasting the day. Has same problem as stock. As soon as you pull it off the battery charger BAM, down to 98% then downhill from there.

Anker FTW!!!!
They make great quality batteries.

I bought one of the 3500mah batteries and am getting great battery life. With CM7 and savagedzen I'm getting at least a full day with gps always on. I've gone as long as 48 hours without charging and still had life.

TheAmazingGoop said:
I bought one of the 3500mah batteries and am getting great battery life. With CM7 and savagedzen I'm getting at least a full day with gps always on. I've gone as long as 48 hours without charging and still had life.
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Click to collapse
How heavy is your use? And are you using a external charger or via your phone?
I would think you would be getting better life than that, What was your use on the phone?

[Q] Slim extended battery?

Hey everybody,
I've tried looking to see if there was a thread about these two batteries before posting but came up with no results. I'm running a stock SGSII (4.0.4) with an Otterbox Defender (downhill skateboarding/military protection). Phone usage includes emails, texting, FB and games.
I'm looking for an extended battery after going through TWO Samsung OEM batteries within 11 months. Both the batteries got the bulge of death. Sprint store techs have run multiple diagnostics and replaced parts but have no idea why this is happening and won't replace my phone.
I came across a 'Galilio' 2500mAh battery as well as a 'Sporting Persistence' 2520 mAh battery while searching around on eBay. I'm staying away from the Andida 2300mAh after reading several stories about how the contacts were misaligned and the battery wasn't really 2300mAh.
I don't want to go with a big, bulky case due to my requirements for protection. I've read about the Mugen 1950mAh batteries being pretty decent, but they're a bit more than I want to spend.
Thoughts? Ideas? Anyone tried either of these?
Thanks!

I got a 2100mah battery that was really just a fake. It does work fine as a spare and it was cheap but its worse life than stock. I suspect those 2500mah you found are fakes too. I tried the andida which had better life than stock but the contact misalignment caused random reboots after a while.
My suggestion is to just buy an external charger and multiple batteries. I just pop an extra battery in my pocket and go about my day then if I burn thru two batteries in one day I still have the third at home.

Anything on the mugen battery? I want to keep my protective Trident case on my phone instead of putting on the cheap back and 3200mah siedo battery where I can't protect my phone... and wish to have increased battery life and I keep having the problem where when I reboot I go from 69% to 19%..... I haven't checked for battery bulge yet
Sent from my Galaxy Nexus using xda premium

Beware of Lithium battery scams, ONLY BUY MUGEN!!!
xPIZZLEx said:
Hey everybody,
I've tried looking to see if there was a thread about these two batteries before posting but came up with no results. I'm running a stock SGSII (4.0.4) with an Otterbox Defender (downhill skateboarding/military protection). Phone usage includes emails, texting, FB and games.
I'm looking for an extended battery after going through TWO Samsung OEM batteries within 11 months. Both the batteries got the bulge of death. Sprint store techs have run multiple diagnostics and replaced parts but have no idea why this is happening and won't replace my phone.
I came across a 'Galilio' 2500mAh battery as well as a 'Sporting Persistence' 2520 mAh battery while searching around on eBay. I'm staying away from the Andida 2300mAh after reading several stories about how the contacts were misaligned and the battery wasn't really 2300mAh.
I don't want to go with a big, bulky case due to my requirements for protection. I've read about the Mugen 1950mAh batteries being pretty decent, but they're a bit more than I want to spend.
Thoughts? Ideas? Anyone tried either of these?
Thanks!
Click to expand...
Click to collapse
In my search for extended slim batteries I learned many lessons. I kept buying them from eBay until I got to the bottom of the conspiracy.
The batteries I purchased were for my Galaxy S2 and my Galaxy S3.
Lesson #1: If the battery price is too good to be true, it probably is. Case in point, I purchased several great deals on 'Samsung' brand OEM replacement batteries, all were under $10 bucks and all were counterfeits. All lasted only 2/3s of the time compared to the old and well used battery I was trying to replace. Some of these fakes didn't even have the chip inside that communicated with my phone, so as soon as you plugged in the wall charger the phone would immediately cut off, which is bad for your operating system. If the battery doesn't communicate with your phone properly, it's a fake. I went one step further and weighed the stock battery against the replacement battery and the replacement was far lighter, further proving it was a fake.
Lesson #2: High capacity fakes. I decided to try my luck at after market name brand and generic batteries that claimed longer battery life (a higher milliamp hours [mAh] or higher capacity). I ordered them one at a time, each time one came I would weigh it, it would ALWAYS be lighter than the stock battery (the only exception is Mugen). That was my first clue at fraud. Some of these brands communicated perfectly with my phone and charged OK but they were still lighter, telling me they had less lithium and less capacity. I tested each several times (because it takes a few charges to break in a new battery) but they were the same as the others, all would last only 2/3s the time of the worn out stock battery I was trying to replace. In all cases I would return the battery and try a different brand. In the end buying Mugen brand for $40-$45 a battery is the only way to get a quality replacement battery that lasts a long time but fits like the stock battery.
Mugen batteries are the only brand I can find that actually weigh more than stock OEM batteries. Mugen batteries last a long time, just like they claim. Now I only buy Mugen. Save up your money, it is worth the extra cash for the longer life. Would you want to carry replacement batteries around with you and swap them out twice a day or just use one Mugen? I charge my phone once at night and then use it all day long. Even on days with heavy use I still put it on the charger with a charge left.
I've tried most of the names you mentioned and many more. Maybe there are other illegitimate companies other than Mugen, but I wouldn't know, and I've looked. For anyone wanting to continue my search, the key is to research the name brand and see if they have a website that looks illegitimate. Do they sell batteries for other model phones and devices? Do they sell their own brand of battery charger? If not they are fly by night and are selling you a low capacity battery with a short life but have slapped a label on that claims a higher capacity. If you order one WEIGH IT and compare the weight to your OEM battery that came with the phone.

Batteries
joeiipuff said:
In my search for extended slim batteries I learned many lessons. I kept buying them from eBay until I got to the bottom of the conspiracy.
The batteries I purchased were for my Galaxy S2 and my Galaxy S3.
Lesson #1: If the battery price is too good to be true, it probably is. Case in point, I purchased several great deals on 'Samsung' brand OEM replacement batteries, all were under $10 bucks and all were counterfeits. All lasted only 2/3s of the time compared to the old and well used battery I was trying to replace. Some of these fakes didn't even have the chip inside that communicated with my phone, so as soon as you plugged in the wall charger the phone would immediately cut off, which is bad for your operating system. If the battery doesn't communicate with your phone properly, it's a fake. I went one step further and weighed the stock battery against the replacement battery and the replacement was far lighter, further proving it was a fake.
Lesson #2: High capacity fakes. I decided to try my luck at after market name brand and generic batteries that claimed longer battery life (a higher milliamp hours [mAh] or higher capacity). I ordered them one at a time, each time one came I would weigh it, it would ALWAYS be lighter than the stock battery (the only exception is Mugen). That was my first clue at fraud. Some of these brands communicated perfectly with my phone and charged OK but they were still lighter, telling me they had less lithium and less capacity. I tested each several times (because it takes a few charges to break in a new battery) but they were the same as the others, all would last only 2/3s the time of the worn out stock battery I was trying to replace. In all cases I would return the battery and try a different brand. In the end buying Mugen brand for $40-$45 a battery is the only way to get a quality replacement battery that lasts a long time but fits like the stock battery.
Mugen batteries are the only brand I can find that actually weigh more than stock OEM batteries. Mugen batteries last a long time, just like they claim. Now I only buy Mugen. Save up your money, it is worth the extra cash for the longer life. Would you want to carry replacement batteries around with you and swap them out twice a day or just use one Mugen? I charge my phone once at night and then use it all day long. Even on days with heavy use I still put it on the charger with a charge left.
I've tried most of the names you mentioned and many more. Maybe there are other illegitimate companies other than Mugen, but I wouldn't know, and I've looked. For anyone wanting to continue my search, the key is to research the name brand and see if they have a website that looks illegitimate. Do they sell batteries for other model phones and devices? Do they sell their own brand of battery charger? If not they are fly by night and are selling you a low capacity battery with a short life but have slapped a label on that claims a higher capacity. If you order one WEIGH IT and compare the weight to your OEM battery that came with the phone.
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Have you ever tried the Anker brand? I have also read that those are legit. But I will like to hear that from someone that actually runs serious tests on them. Thank you

I've had the anker battery for over a week now. With my normal use I get about 20% more life than my stock non bloated battery
Sent from my SPH-D710 using Tapatalk 2

I have the andida and it seems to last about 2 hrs more then the stock one but ever once in awhile when it over heats the phone resets and you lose about 20% battery
Send from a mircowave

Chichitech is legit, 20$ and got a higher capacity, heavier battery for my HTC Evo 3d. I will buy from them again.
Edit not happy with my chi chi tech batteries for sgs2. Loved it for HTC evo v 4g but it seems to be decidedly higher quality than these ones for the sgs2