Develop Bugs

So Ebay batteries?

So I know there are a couple of posts on here but I have found them a little hard to follow. I just got my captivate last sunday and on the stock 2.1 rogers rom I noticed that the battery life was very poor. Since then I am now running cog 3.01 i think and my battery life is now alot longer than before.
For the way I would like to use my phone It is still not enough for what would make me happy. my phone is unplugged at 6:00 am and when i get home by 5 it used to be dead but after "breaking in the battery" and the new rom i get home with about %15 percent battery.
I just bought a triple battery pack off of ebay for $10. these batteries are rated at 1500 mAh, the same as the battery that came with my phone. I am just wondering what I can expect from these batteries.
My plan is to drain two of them completely then leave them in my desk drawer(from what I have read if you plan on storing batteries they should be completely drained first) and use one of them plus my oem battery daily(until they start to lose performance). Again does anyone have any experience with a battery of the sort or any similar third party battery?

they are no where as good as samsung oem battery. even though it says 1500mah it is not or will drop drastically after a month or so of use...i've bought a lot of those batteries from ebay and they always like that even some other well known companies like Seidio do not compare with manufacture's batteries. the difference is usable capacity, oem batteries are around 95% compared to cheap chinese ones that are anywhere from 60-80%.

haha thanks that makes sense why they are so cheap, well i will probs by three new ones every months or so.

I have those ebay batteries. I bought the kit that comes with two batteries and an external charger for about $10.
The ebay battery is has about 60-70% of the power of the OEM battery. I have no real hard evidence just from using it for the past 2 months or so.
I am ok that it is does not last as long as OEM because it was only $10 and it came with the external charger. I love the external charger because it allows me to charge a spare battery while I keep one in my phone.

Saelee said:
I have those ebay batteries. I bought the kit that comes with two batteries and an external charger for about $10.
The ebay battery is has about 60-70% of the power of the OEM battery. I have no real hard evidence just from using it for the past 2 months or so.
I am ok that it is does not last as long as OEM because it was only $10 and it came with the external charger. I love the external charger because it allows me to charge a spare battery while I keep one in my phone.
Click to expand...
Click to collapse
I bought the same ensemble, with essentially the same results excepting perhaps that one of my replacement batteries seems to underperform with about 40% of OEM battery life.
That said, for $10... they're very handy as backups. They'll easily give you a few more hours in a pinch, which is essentially just what I was looking for. I really have no complaints in that respect.
The best strategy for battery life I've found is to buy a handful of wall adapters and position them in places you spend a lot of time at, and to develop a habit of plugging in when you're not moving around.
Sad but true, but mediocre battery life is just kind of a way of life for these (and really all) high-performance Android devices. Excepting getting an outsized and expensive battery replacement like the Seidio 3500 mAh that all but prevents use with many accessories and cases, a couple wall chargers and a car charger are effective if mildly annoying means of managing it.
These generic Hong Kong replacements are entirely effective as emergency supplements, but you'll find yourself preferring the OEM cell still.

Yep I mean for $20 I have two charges and 4 batteries so if I need to go without power , even if not a 100% match for the oem power, it is still damn cheap.

I also got one of these from ebay.
I got the 2x 1500mah batteries + Battery Charger combo.
I must say I am impressed. They are the same quality as my OEM battery. Its so convenient. I never have to run to a charger anymore. Just keep the spare battery in my car or wherever and just pop it in and carry on with my daily business.
When I get home, I just re-charge all the batteries. The Battery Charger even has an LED Light that tells you when its finished. "RED: while charging" and "BLUE: when finished". Charging takes about roughly 3 hours, (just like OEM).
Edit: Been using this for about a month so far. With no problems.. Its the best feeling. My phone is never plugged in anymore. And, I don't have to "pinch the settings" to make my phone last.
IE. lowering brightness to 10%, turning sync off, turning wireless networks off, etc.
HIGHLY RECOMMEND!
only crappy thing is??? I plan to sell this phone soon, when the Galaxy S 2 comes out, if the specs are good enough.

fluidd said:
I also got one of these from ebay.
I got the 2x 1500mah batteries + Battery Charger combo.
Click to expand...
Click to collapse
Would you mind posting the link or giving us the name of the exact vendor you ordered from?... I'm about to order the 2xbatteries and charger combo, but just want to make sure I get batteries that are half way decent. When I search on eBay I get about 20 vendors selling similar combos and given that in HK they're celebrating Chinese New Year... most won't fulfill orders until next week.

i wouldnt waste your money unless you just want an extra.

Like It
SEIDIO 3000mAh 3.7v
Plenty of power
@ Amazon, comes with new battery cover
Works like a dream $56.00
Easy to hold phone

HELL NO i'm not spending $56 on a battery

Sieidio Battery 1750mAh Extended Battery Review

I purchased the Sieidio Battery 1750mAh on Amazon about a month ago. This battery is not worth the money at all. If you want an extra battery then I suggest buying an OEM battery.
I might be wrong but I think this battery actually goes down faster than the one that came with the phone. My biggest problem with this battery is that it does not fit properly in the phone. It can just be set down or place in my pocket and that is enough to make the phone.
DON'T wast you money on this battery

_TXN_ said:
I purchased the Sieidio Battery 1750mAh on Amazon about a month ago. This battery is not worth the money at all. If you want an extra battery then I suggest buying an OEM battery.
I might be wrong but I think this battery actually goes down faster than the one that came with the phone. My biggest problem with this battery is that it does not fit properly in the phone. It can just be set down or place in my pocket and that is enough to make the phone.
DON'T wast you money on this battery
Click to expand...
Click to collapse
I don't even understand your review, but I guess I do understand you are being negative.
But this battery works way better than the stock battery that came with my EVO. It ****s on the stock battery. Diarrhea.
Maybe it's just because I bought it for $50 from Best Buy. What a bargain!

Necrosan said:
I don't even understand your review, but I guess I do understand you are being negative.
But this battery works way better than the stock battery that came with my EVO. It ****s on the stock battery. Diarrhea.
Maybe it's just because I bought it for $50 from Best Buy. What a bargain!
Click to expand...
Click to collapse
Sounds like too much for a 1750 battery. I'd rather just go all out and get the 3500
Sent from my PC36100 using Tapatalk

_TXN_ said:
I purchased the Sieidio Battery 1750mAh on Amazon about a month ago. This battery is not worth the money at all. If you want an extra battery then I suggest buying an OEM battery.
I might be wrong but I think this battery actually goes down faster than the one that came with the phone. My biggest problem with this battery is that it does not fit properly in the phone. It can just be set down or place in my pocket and that is enough to make the phone.
DON'T wast you money on this battery
Click to expand...
Click to collapse
I got two 1800mAh batteries for about $30, and experienced the same thing. After awhile though, I realized that you have to do a few things to get better battery life.
1) Charge the battery to full while the phone is on.
2) Unplug and plug back in to verify that the phone is fully charged (green led)
3) Turn the phone off
4) Unplug, plug in, and wait for a green led
5) Repeat that 5-10 times
6) Then while still plugged in, reboot into Recovery and wipe the battery stats via the advanced menu.
7) Reboot, and use your phone as you normally would.
This may sound like alot, but it really only take about 5 mins. Even after wipe, it will still take about 5 full discharges to reap the better battery life. Hope this helps!

I think its just luck of the draw on aftermarket batteries (the cheap ones at least)
I have heard good and bad on ALL of them.
I got the Chichitec/htcexpress 1800 batteries with charger. Came in the other day and I couldn't be happier. 14 hours on initial charge, that's unheard of for me. On my stock battery I had to keep the phone plugged in most of the day at work just to still have juice by the time I got home. And supposedly these things start acting even better after a few charge cycles.
(Fits with stock battery door too)
But for every person that has a good experience with any of these companies, there's someone else with a horror story.

_TXN_ said:
I purchased the Sieidio Battery 1750mAh on Amazon about a month ago. This battery is not worth the money at all. If you want an extra battery then I suggest buying an OEM battery.
I might be wrong but I think this battery actually goes down faster than the one that came with the phone. My biggest problem with this battery is that it does not fit properly in the phone. It can just be set down or place in my pocket and that is enough to make the phone.
DON'T wast you money on this battery
Click to expand...
Click to collapse
Could have told you that before you bought it, ratings by aftermarket reputable companies are close and never accurate...if they rate it at 1750, it's probably 1500-1650... The stock is 1500 so yes you wasted your money. Now on the other hand, the 3500 is the best investment anyone could ever make....

It's been proven long ago seidio over rates their batteries. The "1750" is actually just under 1500, so less capacity then the stock battery.
Sent from my PC36100 using XDA Premium App

just terribad in my opinion, gonna stick to my seidio 3500. rather have the size and life than a small size and a measly bump from the 1750mah battery

They rated it less than a 1500 stock battery.

Key with extended batteries is that you actually have to charge them longer than your phone indicates.
Example: I phone said it was fully charged at 3:26am in the morning. Yet it continue to charge until at least 6:45am before it was constant. Granted I am using an SBC kernel but even without, you need to let it charge the night. Don't let the green light fool you. It takes a few extra hours to charge even if the led light is green!
You should just about fully drain your battery and then let it charge overnight. If you aren't on an SBC kernel you may actually want to charge your phone while it's off so that the battery dictates the charge.
You should also wipe your battery stats once the phone is fully charged.
Try that and see if it works for you. I know that I was getting great battery life even on the stock battery. I play "Word With friends" (at least 15 matches running) a lot (at least 15 matches running concurrently) and this game actually drains battery. I still got through the day fine though I also carry a Touch Pro 2 and having the batteries that are the same size allows me to swap when needed.
I have the 2650mah one from sprint and my 3500mah seidio coming in the mail tomorrow. I'll probably write a review for it later. Note, On my 2650mah, it's already on its 12th hour and I was was playing WWF, surfing the web, made several calls and it's still at 77%. I will leave it off the charger tonight and see how it fairs tomorrow.
Good Luck!

I have tested these and if they do last longer then stock, it is only like maybe 20 mins. I have an external charger as well as running the SBC kernel to get a complete charge. I have the sprint 2600 battery as well and love it. Not many cases for it but I have modified a sedio rugged and ballistic to work with it. I let my wife use it for a few days in her evo and had to fight to get it back from her.
Sent from my PC36100 using XDA App

Anker 1900mAh battery?

Hey guys browseing Amazon or GS2 accessories and I came across the Anker 1900mAh battery.
Now ive had the Anker 1900 on the Sensation and its legit a beast of a battery with extra juice, anyone used this for the GS2?

why not just wait a few weeks and buy the proper 2000mah battery??
iam sure samsung would have made a battery this size if possible rather then build extra back covers due to the 2000mah battery they have designed
basically i dont think anker could squeeze another 300mah into the battery at no extra size , its probably not what it says it is and i would go the official route , i have found all these cheap batterys to be useless in my times of owning mobile phones
to sum it up just buy the offical 2000mah battery from samsung or the bigger one from mugen if you want better battery life

look for anker 2300maH on ebay for $12-14 . buy it and make a review

tempted!
im very tempted. amazon uk has an offer for 2 and dockcharger and travel charger for £13. Even if its 80% of original battery i would be happy. But seems like a new release..not 1 review...
I would get the official samsung one but i have the perfect a leather, carbon fibre cases. would it fit in there? i don;t know...will i find an equivalent case that fits it...i don't no. If only if they had a demo version with new battery in a highstreet store i could try putting my case on,

ohh this make has had some reviews from same phone and different phones
im not advertising lol, just discussing reviews
http://www.amazon.co.uk/product-reviews/B00567Y7A6/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1
http://www.amazon.co.uk/product-reviews/B005DY4MAW/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1
http://www.amazon.co.uk/product-reviews/B0058SK7YS/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1

what about 3500 mah ? its for $8 on ebay

buxz777 said:
why not just wait a few weeks and buy the proper 2000mah battery??
iam sure samsung would have made a battery this size if possible rather then build extra back covers due to the 2000mah battery they have designed
basically i dont think anker could squeeze another 300mah into the battery at no extra size , its probably not what it says it is and i would go the official route , i have found all these cheap batterys to be useless in my times of owning mobile phones
to sum it up just buy the offical 2000mah battery from samsung or the bigger one from mugen if you want better battery life
Click to expand...
Click to collapse
Where i can get 2000mAh battery? I really need it.

ravian29 said:
what about 3500 mah ? its for $8 on ebay
Click to expand...
Click to collapse
probably not even half that capacity..

I try the anker battery and doesnt work for me. That battery is bad quality because I charged and when the phone was in 5% the screen staring flashing. The phone reboot when is in 5%. I return the battery and they gave me a refund.

Joey2o11 said:
probably not even half that capacity..
Click to expand...
Click to collapse
Eug measured the capacity one of the spider foot batteries as 2413 mAh.
Even though it is well under the stated rating there is nothing that touches it for value. USD $10 for a 2413 mAh battery is a fantastic deal.

bocautrang.pt said:
Where i can get 2000mAh battery? I really need it.
Click to expand...
Click to collapse
Go on expansys if you are in the UK...they have them for sale on their website

I ordered an anker battery set. should be here in one or two days will report back

I ordered it, nothing to complain but follow my feeling its not like 1900mha... same as 1650mha... one more thing universal usb travel charge need 8h to full charge( output 350mha+-50mha)
>>> with me, im using USB cable + universal usb travel and ..... im smell something from cable so i never do it again

Sick Enough To Die said:
I ordered it, nothing to complain but follow my feeling its not like 1900mha... same as 1650mha... one more thing universal usb travel charge need 8h to full charge( output 350mha+-50mha)
>>> with me, im using USB cable + universal usb travel and ..... im smell something from cable so i never do it again
Click to expand...
Click to collapse
so basically your saying its got the capacity of the OEM bettery?

Read some really good reviews in the sensation forum. I would try this but its hard to find a seller who ships to Brazil.

tdesbien31 said:
so basically your saying its got the capacity of the OEM bettery?
Click to expand...
Click to collapse
yes, i do but its my opinion

My experience will be subjective, but I've been using 1900mah Anker batteries for the last 2 weeks. They are OK. With original battery I get 12-13 hours when everything ON! With Anker approximately 16-17 hours.

is 3500 mah battery better than 1900 mah ? increasing number of mah is better or decreasing ?

ravian29 said:
is 3500 mah battery better than 1900 mah ? increasing number of mah is better or decreasing ?
Click to expand...
Click to collapse
More mAh is better. Just be aware that the 3500 mAh spider foot battery is actually about 2400 mAh. At $10 that's not really a problem though...
Sent from my happy place.

k1000716 said:
More mAh is better. Just be aware that the 3500 mAh spider foot battery is actually about 2400 mAh. At $10 that's not really a problem though...
Sent from my happy place.
Click to expand...
Click to collapse
thanks for your reply, is this spider foot battery ?
http://www.ebay.com.au/itm/3500mAh-...AU_MobilePhoneAccessories&hash=item2a13b5564c

Anker 1800mah on Amazon

http://www.amazon.com/Anker-Batteri..._26?s=wireless&ie=UTF8&qid=1316372694&sr=1-26
Read an article in the HTC Sensation forums where many of the posters picked up an Anker battery as a "Why the hell not for $15?" deal and had generally positive results. Did a search and not only does Amazon sell multiple varieties of Anker batteries, but many of them have a ton of positive reviews.
Before all the battery naysayers jump in and shout "You can't get an extra 300mah in a stock battery! It's another chinese scam and it's probably only 1.03mah!" the Sensation people explained it as being noticeably thicker than the stock battery while still fitting snugly inside the battery door. A good 1mm thicker at least.
Anyway, bought myself a pair along with a car charger for $30 for two batteries, a car charger, and a USB charger. Will let you all know if its a huge letdown, or if the positive reviews aren't just Chinese robots blowing smoke up our you-know-what.

Hey can you do a favor? Install battery calibration app from market and tell us how many mV (Milli volts) it say when the phone is truly 100% charged.

interested in seeing how those batteries are
was about to buy one
keep us posted

I've read in some of the comments on Amazon that they work best when the wall charger is used, though that may be because the wall charger keeps it at 100% while charging inside the phone causes the battery to drain down to 90% if left on the charger after it reaches 100%. Of course, the battery monitor won't tell you that to keep Samsung's support lines from clogging.
Thankfully this is Amazon and not the overseas shipping I had to deal with with my last battery, so it should arrive (according to Amazon) somewhere between the 23rd and 28th. Will test it heavily with my current ROM and let you all know how it fairs.

rakeshchn said:
Hey can you do a favor? Install battery calibration app from market and tell us how many mV (Milli volts) it say when the phone is truly 100% charged.
Click to expand...
Click to collapse
mV will not tell you anything about the capacity of a battery, only how close to fully charged it is.
Sent from my SGH-T959 using XDA App

shrapnelx said:
mV will not tell you anything about the capacity of a battery, only how close to fully charged it is.
Click to expand...
Click to collapse
True. If it's anything like the stock or mugen battery that I have, it'll cap out around 4250 for Froyo, 4200 for MIUI/Gingerbread.

Momax 1700mah is fine and chip.

Well, while discharging the first battery through normal use, I was actually getting a little frustrated that it was taking so long. Got about 24hrs out of it from wall charge to phone shut off, including about 8 - 9hrs of overnight standby.
Got the second battery off the charger and into the phone, and after about an hour it's still showing at 100% and 4100 - 4180ish millivolts.
Anyone, nothing is decided just yet. Will have to see how they hold up after the first 5 full charge and discharges that "sets" the batteries internal memory. Or whatever.
I thought these AOSP ROMS were supposed to drain battery, dammit!

Just about done "Breaking In" the new batteries. Two things: On the surface, they seem to last quite a while given the last time I tested the Mugen battery I was on Froyo and I'm now on MIUI.
From what I've heard, Gingerbread on the Vibrant, whether it's an i9000 leak like Malice or built from the ground up like Cyanogen 7 or MIUI, tends to burn battery faster than on Froyo. I'm also using different voltage settings, a different kernel... you all get the idea.
Apart from flashing back to Froyo, or completely redoing tests on my stock and Mugen batteries on top of the new Anker battery, whatever results I get will be a bit skewed.
Also, MIUI seems to allow the battery to get further down in power before shutting it off. Froyo would often cut me off around 3700, but I usually see MIUI showing battery power as low as 3300 before shutting down.

Your link points to the 2x package...if you look up the batt itself and read the reviews, most will tell you it's basically a cheaper oem replacement
http://www.amazon.com/Anker-1800mAh..._1_5?s=wireless&ie=UTF8&qid=1317360583&sr=1-5
Still a great deal at 11 bucks shipped.... by itself...and assuming it lasts...my original batt that came with my phone died couple of weeks ago... (less than 2hrs on a froyo rom...) had another oem that I'm using now..so far so good, but who knows...this seems like a great buy, but doesn't sounds like it's any kind of gain even with the 1800mAh rating...

Samsung Galaxy SII Touch batteries work in our phones. Tested.
They are 1800mah and can be found for $23 shipped. They are GENUINE Samsung as well so...it WILL be the advertised 1800mah. Just saying.

Even cheaper on ebay : http://www.ebay.com/itm/330601629006?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Sofiz has the Pisen battery for SGS II 1659 mAh, will this work on the Vibrant?

just ordered one too, hopefully it works out

Some reviewers saying battery only charges with wall charger and phone shows unsupported battery message. Those who have the battery please confirm.

adityamunshi said:
Some reviewers saying battery only charges with wall charger and phone shows unsupported battery message. Those who have the battery please confirm.
Click to expand...
Click to collapse
I think I went over that at least 3 times already. Battery is a perfect fit. Charging is perfect (USB computer and Wall plug in). EVERYTHING WORKS with it. I wish people would read the topic more. It's only 2 pages. . .

Only reason it wouldn't charge in your phone is if you owned a Fascinate, in which case, get out of our forums, punk!

Ordered one from ebay and pretty happy with it so far. Only had it a couple days so far though and still messing around with different roms and kernels so hard to say exactly how long of a charge i get with it.

Got mine today, charging now. Thanks!

Just recieved mine from amazon, and so far its been great !

I bought the two off of ebay that come with the wall charger. I'm getting much improved battery life right now. I'm very happy with them. Even though they do make the phone slightly heavier, it's worth it IMHO.

Largest capacity battery without extended case?

Hi, I was wondering what the highest capacity battery was without having to replace the back cover?
I know of the anker 1900mah, what about the Samsung 2000mah? Also, what do you guys think of buying no name batteries that are advertised as 1900mah?
I've bought no name batteries for my HTC incredible s before, I bought an 1800mah battery which gave me the exact same battery life as a 6 month old stock 1450mah battery, so thoughts?
EDIT: I'm a stickler for thinness so even if a back plate adds 1mm to it, i don't want it, I've had enough of my thick as stars HTC incredible s

the samsung 2000mah battery gives you a new back cover and makes your phone a little bid thicker, but not much. Most hard cases will still tightly fit
This would be your best option, as you are sure it will be 2000mah.
I myself got the 1900mah anker battery and dont really see any difference with it... It is about the same as stock. My 2000mah battery is arriving soon ^^
There are enouf pictures/movies of the 2000mah batter, there you can see how big it is I myself think it will make the phone easyer in the hand

Do instead of it having a bulge at the bottom, now everywhere is as thick as the bulge?

zijin_cheng said:
Do instead of it having a bulge at the bottom, now everywhere is as thick as the bulge?
Click to expand...
Click to collapse
yes!
I only get 2.5 hours screen on time with data most of the time off with my 1900 anker battery, which is same/worse than default battery.
I think your safest/best choice is the samsung's official 2000mah battery. Do know that many slim cases wont fit anymore.
You can clearly see the size here:
http://www.youtube.com/watch?v=5tHvfEtsvUg&feature=player_detailpage#t=327s

Oh yes, since I'm getting a slightly bigger case along with the 2000mah battery, why not get something with even more capacity? What's the largest capacity that will fit in the back plate that comes with the 2000mah extended battery?

zijin_cheng said:
Oh yes, since I'm getting a slightly bigger case along with the 2000mah battery, why not get something with even more capacity? What's the largest capacity that will fit in the vacillate that comes with the 2000mah extended battery?
Click to expand...
Click to collapse
2000 mah
You can buy even bigger ones, but they will be 2-3x bigger in size.
And if 3rd party batterymakers say it holds 3500 mah, it actually is only 2500.
Size-quality wise, the official is the best by far!
And if you are really scared of running out of batteries when you are on vacation or something, just get a 2nd battery? This way you can switch battery whenever you want. And you will always have a spare fully charged battery with you

manmad said:
2000 mah
You can buy even bigger ones, but they will be 2-3x bigger in size.
And if 3rd party batterymakers say it holds 3500 mah, it actually is only 2500.
Size-quality wise, the official is the best by far!
And if you are really scared of running out of batteries when you are on vacation or something, just get a 2nd battery? This way you can switch battery whenever you want. And you will always have a spare fully charged battery with you
Click to expand...
Click to collapse
alright cool, thanks lots for your help, been mostly an androidforums Guy, don't come here often

I have quite contrast opinion and experience on Anker battery on my SGS2. It mathematically holds some 16% more juice, but actually performs with 20-25% improvement. My friend who bought one for his Note (both orig and Anker are 2500mAh) says Anker holds up 15% longer (orig would drain every day between 7 and 8 pm, and Anker holds for another hour and a half, approx). It fits your original back cover, and I think it is worth trying.

adriatic_mne said:
I have quite contrast opinion and experience on Anker battery on my SGS2. It mathematically holds some 16% more juice, but actually performs with 20-25% improvement. My friend who bought one for his Note (both orig and Anker are 2500mAh) says Anker holds up 15% longer (orig would drain every day between 7 and 8 pm, and Anker holds for another hour and a half, approx). It fits your original back cover, and I think it is worth trying.
Click to expand...
Click to collapse
Oh that sounds good, but don't companies like Anker, Chichitec and mugen "overadvertise" their battery capacities? A 1900mAh would be maybe a 1500mAh and a 1800mAh would be a 1400mAh?
Oh and did you compare your Anker 1900mAh to a new stock battery or one that's maybe 6 months old?

get the 2000 mah battery from samsung, its great, doesnt make the phone any thicker but it makes enough of a difference mate!

zijin_cheng said:
Oh that sounds good, but don't companies like Anker, Chichitec and mugen "overadvertise" their battery capacities? A 1900mAh would be maybe a 1500mAh and a 1800mAh would be a 1400mAh?
Oh and did you compare your Anker 1900mAh to a new stock battery or one that's maybe 6 months old?
Click to expand...
Click to collapse
Anker is not overadvertisig its batteries like some Chinese factories. When I first tested Anker, my stock battery was some 3 months old. You should know that Anker batteries (as well as stock ones) need some 5 complete charges to start to act fully with their capacity, so do the test not the same moment when you buy the battery, but after 5-6 charges. I am using Anker battery now 99% of the time, and keep my stock one at home, full, just in case I need the phone full urgently. Every time I keep stock battery in phone I can see how it's depleated faster, so Anker is still better than stock one, some 8 months after using it heavily.
My stock battery is always on 15-20% at the end of the working day (from 8am to 22h-midnight), empty by midnight on weekends. Anker can withstand one day + night + morning shift on working days, and full day on the weekend, with some juice left.
Oh, and I use battery circle with % on it, so I can pretty accurately monitor
how fast is my battery draining while on internet, watching video, playing games (you don't see the % during the game, but you see it before and after), calling etc.

ho guys I found on a forum here on my country/county this announcement: http://forum.anunturi-galati.ro/index.php?/topic/335260-acumulator-baterie-samsung-galaxy-sii-i9100/
and i can't tell anything from the case and the info isn't to detailed... what do you guys think?

@gigeaky: a battery like this is fake... trust me!
an original 2000mah samsung battery looks like this on the phone... :good:

gigeaky said:
ho guys I found on a forum here on my country/county this announcement: http://forum.anunturi-galati.ro/index.php?/topic/335260-acumulator-baterie-samsung-galaxy-sii-i9100/
and i can't tell anything from the case and the info isn't to detailed... what do you guys think?
Click to expand...
Click to collapse
Se vede ca-i chinezarie cea din link. Daca nu ma insel, pe cea mai ieftina baterie OEM de 2000 mAh am vazut-o la Orange Shop, 17 euro costa.
Cheers.

I last saw one that made the s2 just 1mm thicker I will post it when I find it again

i think the best extended battery you could get without any noticeable/annoying bulges, is the legit 2000mAh from Samsung.. it does not cost that much considering that it is not some hoax and it also comes with their custom back cover for the extended batter.. I don't trust Chinese products entirely