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QCell T-Mobile Samsung Galaxy S2 / SII T989 3650mAh Extended Battery + FREE Battery Cover! (NOT Compatible with i9100/i727/D710/i777)

by QCell
| 2 answered questions

Price: $19.99 & FREE Shipping on orders over $35. Details
In Stock.
Want it Tuesday, April 22? Order within and choose One-Day Shipping at checkout. Details
T989 Black
  • T-Mobile Galaxy S2 Extended Battery by QCell! Highest Capacity Battery in the Market!
  • Designed in Canada! Double Your Battery Life! Optimized for Galaxy Series!
  • Comes with Free Battery Cover!
  • DYNAStop overcharge IC stopper built in!
  • Voltage: 3.7V / Premium Quality and Best Material used!

Frequently Bought Together

QCell T-Mobile Samsung Galaxy S2 / SII T989 3650mAh Extended Battery + FREE Battery Cover! (NOT Compatible with i9100/i727/D710/i777) + 5pcs Samsung© Galaxy S2 S 2 II T-Mobile SGH-T989 Premium Clear LCD Screen Protector Cover Guard Shield Protective Film Kit (5 Pieces) + Car Charger for Samsung Galaxy S II T989 (T-Mobile), Galaxy S II i777 (AT&T)
Price for all three: $22.04

These items are shipped from and sold by different sellers.

Buy the selected items together


Technical Details

Color: T989 Black
  • T-Mobile Galaxy S2 Extended Battery by QCell! Highest Capacity Battery in the Market!
  • Designed in Canada! Double Your Battery Life! Optimized for Galaxy Series!
  • Comes with Free Battery Cover!
  • DYNAStop overcharge IC stopper built in!
  • Voltage: 3.7V / Premium Quality and Best Material used!
  See more technical details

Product Details

Color: T989 Black
  • Shipping Weight: 3.2 ounces (View shipping rates and policies)
  • ASIN: B006SK5JSO
  • Item model number: SG2TMU1
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (1,205 customer reviews)
  • Amazon Best Sellers Rank: #84,669 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
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Product Description

Color: T989 Black

Not Enough Power for all your video, internet, text messaging and music needs? Get QCell 3650mAH Ultra Extended Battery specially designed for Samsung Galaxy S2 T-Mobile T989 smartphone!

QCell Extended Battery doubles the capacity of your original battery! We have ensure the best cells and best components are used on the battery for ultimate longevity and safety!

No longer have to worry of battery overcharge with our DYNAStop IC chip built in the battery! We also include a UV coat Pearl Black Cover to match up your phone!

*Actual battery life will vary depending on your specific hardware and software configurations and network conditions.

*this battery is oversize and require the use of included back cover

*To charge the extended capacity, please leave battery charge for 2-3 hours after 100% charge reached.

*All Extended Batteries require 5-6 full charge / full discharge cycles for maximum capacity. Rare occasion of 8-10 full charge / full discharge cycle is required for maximum capacity


Customer Questions & Answers

Customer Reviews

I have found that they last as long or longer than the original battery.
M. Hardman
I have had this battery for a few days now and I can now use my phone without having to carry my charger everywhere.
pleased user
The case on the back fits the phone like they were made together perfectly snugg.
R. Coombes

Most Helpful Customer Reviews

80 of 81 people found the following review helpful By longcat on November 16, 2012
Color Name: N7100 Black Verified Purchase
I've tested a number of batteries for the GS3 and now starting with the GN2 with a CBA-III/CBA-IV battery analyzer. It's become a personal project of mine since the last QCell battery I got had plastic spacers inside where other batteries had battery. I'm glad to report that this battery appears to be legitimate.

I'm kind of surprised and concerned to see that I'm the first verified reviewer for this battery. All the other reviewers came out of the woodwork making their first reviews on amazon for a product they got elsewhere...

I've included a chart from my test results comparing the Hyperion and QCell batteries in my first comment - and they're practically equal. QCell delivers about 3200mAh per battery with a 500mA load. With a higher load of 2000mA, the rating would be about 3125mAh capacity.

The included charger has a usb charging port and is no worse or better than any other brand's included charger -- or any of the GS3's chargers. It appears to be the same as the GS3 charger, but with the prongs rotated counter-clockwise 90 degrees so the battery sticks out to the right. This means that it's slow as ever - and will take longer to charge than a GS3 battery because the battery has higher capacity.

This battery delivers what it promises, but I'm concerned about the number of first time reviewers that just had to comment on how great the battery is. Based on battery capacity alone, I would recommend it.

Based on the practices of QCell I have seen: small cells in batteries and filling the space with plastic, campaign downvoting of negative reviews and revealing customer pictures, spamming the customer images to hide revealing photos, putting sockpuppet 1-star first-review reviews on competitors products, putting positive sockpuppet 5-star first-review reviews on their products, I would never recommend a QCell product.
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81 of 85 people found the following review helpful By A. Deanda on July 26, 2012
Color Name: Black Verified Purchase
The batteries and the external battery charger both work great so far. The batteries are exactly what I was looking for and include NFC. I also own an Anker battery and these QCell batteries have just as good battery life, if not better, and the best part is I don't have to sacrifice NFC with the QCell batteries. The charger brings all of my batteries to 100% as well. The Anker external universal charger only charges the batteries to around 93%.

These are the best replacement batteries on the market at the moment.
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68 of 71 people found the following review helpful By Firetruck41 on August 4, 2012
Color Name: Black Verified Purchase
I bought the Q-cell 2 battery/charger package about 2 weeks ago, it shipped quickly. The batteries do indeed have NFC just as the OEM batteries, and I use NFC daily. They fit exactly as the OEM batteries and seem to have similar battery life. I can't quantify it, but I don't notice a difference on battery life whether using the original battery or the Qcell, in fact, I usually don't know/remember which battery I have in the phone unless I look. I would say 2300mAh is probably not accurate, I would say they are probably 2100mAh, same as the stock battery.

The charger does take a long time to charge the batteries, about 8 hours from 10% to 100%, but it does charge the batteries completely. There are no instructions in the package, and they are just in plain boxes. I did find the the charger LED is purple while charging, and turns blue when the battery is fully charged. The wall charger has a USB out to allow you to use a usb/micro-usb to charge your phone directly, however based on how long it takes to charge the spare battery in the charger, I haven't tried to charge a phone directly, seems like it would take forever.

Overall, I think this is a great value for $25.
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170 of 193 people found the following review helpful By Henry on August 13, 2012
Color Name: Black Verified Purchase
I rarely leave product reviews but based on misleading product description and likely fake 5 star ratings, I felt more inclined to do so.

After using this product for more than a week, I noticed battery life was not nearly as good as my stock OEM Samsung battery. I did not do any scientific testing, just regular day to day use. I would average approximately 15 hours on my stock battery while averaging only 10 hrs on the QCell Batteries.

I took it upon myself to peel open the sticker and found that these batteries show 2100mAh on the actual inside of the battery. While this is still good the fact that it rated at OEM specs, I find it very misleading that the seller is advertising these as 2300mAh.

Please take this in consideration when purchasing these batteries. They are not rated as what is advertised and I'm still not getting nearly as good battery life as with the OEM.

I will upload a picture for reference.

Update 08/13/12: Immediately after leaving this review, it already got a "0 out of 1 people found the following review helpful". Looks like this company QCell is on top of all these reviews. Due to this, I am changing my initial 2 star rating to 1 star now.
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66 of 72 people found the following review helpful By pcaugh on July 19, 2012
Color Name: Black
These work great with my Verizon S3 phones and I have tested the NFC capabilities using S Beam. Beware of other S3 replacement batteries. Besides Samsung, this is the only one I could find that supports NFC. The battery life is as good or better than the original Samsung battery.
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42 of 45 people found the following review helpful By The Darker side of Light on March 1, 2013
Color Name: D710 Black Verified Purchase
After a few weeks with this battery & running extensive tests (results are below) I needed to see if this really worked

So being that its 4100mAh & stock is 1800mAh, does it double (or more) the performance over stock? ... yes & no ! You'll get the most if your phone is ROOTED! Simply because the built in battery meter is not calibrated to this and unless your phone is rooted there is no way to do it. So when your phone gets to 0% it turns off even though you battery may actually have power. Plus when you charge it to 100% and unplug it, it immediately goes down to like 95%. Everything below was done WITHOUT using root to calibrate device. So if you are not rooted no problem but everything changed for me when I did everything below and THEN calibrated it through root! a BIG difference.

Ok so here we go...... NOT including gaming, if you are a heavy user such as talking, using a bluetooth device during most of your calls, watching videos & taking pics, then you will get about a 30-40% increase over stock. If you are minimalist & only text (even quite a bit) & do some surfing or social media posting stuff WITHOUT talking much or watching vids/playing games, then you should get about 80-110% better than stock.

Some tips to get the most out of this battery:
1. Before you begin, disable any battery "extender" apps you may have like JUICE DEFENDER, turn off all of its options or just uninstall it altogether if you're not sure.
2. This battery has to be charged fully & fully discharged 6 times! So charge it when you get it & let it run out to the point that the phone shuts off on its own thru normal use then do this 5 more times.
3.
Read more ›
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