[Nexus S Accessories] lambda30:
Comparison between the original Nexus S 1500 mAh battery and the 1440 mAh Samsung battery​

General settings:

- brightness set to maximum (100%)

- screen timeout set to maximum (30 mins)

- GPS ON / wireless networks ON (for Google Maps)

- Mobile Data ON

- 3G ON

- Sync ON (Contacts, GMail, Calendar, Reader + SiMi weather each 3 hours)

- WI-FI OFF

- Bluetooth OFF

Services running under the test (I'm not sure these DO have an impact on battery life, but just to be on the safe-side):

- SiMiClock

- 3G Watchdog

- other Android-specific services

Services cached under the test (again, i'm not really sure these count, but I wrote them down in case someone finds something weird or has questions):

- Android Agenda Widget

- Google Reader

- GTasks

- LED Light

- Brightness Level

- other essential Android-specific services

Testing conditions:

- Nexus S i9020-T version, 2.3.4 stock ROM, unlocked bootloader, stock recovery, stock kernel.

- each of the 2 batteries was plugged into the phone, charged till the phone said "Charging complete" (that meant 96% in each case), then discharged till 0%, until the phone shut down by itself.

- keep the screen ON at all times; yes, that means check every 30 mins (because of the screen timeout) and slide a finger across the screen to re-activate the 30 mins timeout timer AGAIN (and again... and again, etc. etc., every 30 mins).

- signal strength 11 asu (+/- 2 asu); check this in Status under About Phone.

- in each test, the phone was placed in the exact same place, it was not moved.

- sync was enabled, but I get emails like one per week, so the sync activity was very low (only Google Reader sync every hour).

- no activity on the phone whatsoever (phone calls in/out, sms in/out).

Battery performance comparison:

1500 mAh battery (top at 96%) = 2h 44mins (the original Nexus S battery)

1440 mAh battery (top at 96%) = 2h 26mins (the OEM Samsung 1440 mAh battery)

In each of the 2 tests, the battery % usage was:

- Display - 78%

- GPS - 14%

- gpsd - 5% (I never saw this thing until now; WTF is it ?!)

- Android System - 3%

Verdict:

Well, the OEM Samsung 1440 mAh battery didn't add up to the performance of the original 1500 mAh Nexus S battery, as I hoped, but it packed quite a punch. The difference between the 2 isn't all that bad in real life situation, but the ~20 mins difference out of a total of 3 hours could scare some people away. Anyway, if you compare it to other <1600 mAh 3rd party batteries out there, I think you will get better results with this one. And, furthermore, it's the cheapest one (I think) at only 5$. How can you ask for more when it's THAT cheap, and made by Samsung ?

In the end, I have to say that for 5$, this OEM Samsung 1440 mAh battery is quite a bang for the buck !

PS: I forgot to tell you where you could ACTUALLY buy one of these if you so desire. Just do a search on eBay for the original Nexus S battery MODEL NUMBER. (AB653850CA)

Additional INFO:

1. The test is a derivate from Ploone's comparison test from his topic over here http://xdaforums.com/showthread.php?t=1058763 Thanks a lot man for the idea and for your video reviews !

2. I hope I was thorough enough. If some of you have questions, please, do ask, because maybe I have forgot something important.

3. Also, if you don't mind and have some spare time for this, could you please conduct the SAME test as I did to see some more results ? Because I still have the impression that my original 1500 mAh battery sucks. Thanks !

*Side-Note:

Ploone's review of the 1600 mAh Mugen Power battery indicated the following results:

3h 25 mins = 205 mins - 1600 mAh Mugen Power battery

4h 32 mins = 272 mins - 1500 mAh Nexus S battery

That's a ~1.327 ratio for the Nexus S battery.

From my comparison (yea, I know there are many variables changed in the testing methodology, but the ratio should stick with the batteries, despite the testing conditions):

2h 26 mins = 146 mins - 1440 mAh OEM Samsung battery

2h 44 mins = 164 mins - 1500 mAh Nexus S battery

That's a ~1.123 ratio for the Nexus S battery.

A greater ratio for the Nexus S battery means that it is more powerful than the opponent. So, because the ratio is smaller in the 1440 mAh Samsung comparison test than the ratio from Ploone's test, that should translate in the fact that the 1440 mAh battery is more powerful than the 1600 mAh battery. It's also 10 times cheaper (50$ vs 5$, aprox.), LOL ! (I'm not judging you, Ploone; I'm only judging that Mugen battery)