[AT&T Samsung Galaxy S II SGH-I777] spexwood:
Battery tests

Ok, so I will post my test results as I finish them.

My test should come pretty close to simulating a very heavy phone user. Here are the things that I am purposely doing to be sure that battery drain is consistent for each battery test:

1) Wifi is turned on

2) Bluetooth is turned on

3) GPS is turned on

4) Screen is set to NEVER turn off (screen display is ALWAYS on)

5) Screen brightness is set to the lowest value AND automatic is turned off

6) "Power Saving Mode" is turned off

I also have the following apps installed, but they are disabled for these tests:

1) SetCPU- processor is set to stock speeds (200MHz min and 1200MHz max) and all profiles are disabled

2) Juice Defender Ultimate- 100% disabled and closed out

3) Total Screen Control- 100% disabled and closed out

PLEASE keep in mind that because of my controlled variables, battery drain will most likely be faster than when normal phone usage, and MUCH faster than normal phone usage + battery saving efforts/apps. With that said, do not freak out if a battery seems to last only a couple of hours. The goal here, is to find the battery that lasts the longest. The longer it lasts under these conditions, the more battery juice it has. ;)

Also, my phone info is:

Stock UCKH7 (rooted + most bloatware removed)

UckH7 modem

==========================================================

TEST 1: Hyperion 1800mAh (-NFC)

**When I bought this battery, I received two batteries and a wall charger (free gift). I will test both batteries.**

Battery A:

Notes: I received 1 text message and sent 1 text message during this test.

I also performed this test first because it is the battery I normally use, so it was in my phone already.

Phone reached 50% after 4H 4M 19S

Phone Reached 10% after 5H 38M 35S

I thought it was weird that once the phone hit 50%, it only took about 90 minutes for the battery to drain the additional 40% before reaching 10%. For those who do not know, this battery is around $8 on Amazon (I got 2 for $16 and a free wall charger) and is probably Chinese like the Bluegeta. It is also much lighter than the stock battery.

You know, this explains why I have been suffering from bad battery life -_-'

Oh yeah, I should also note that this battery always charged up SUPER fast from 0%. These results also explains that too!

**Because of this batttery's horrible battery life, I will also test the second battery to rule out the possibility that the first battery (which I am calling Battery A) was not simply defective.**

Battery B:

Note: No texting whatsoever was done this time

Phone reached 50% after 4H 6M 31S

Phone Reached 10% after 6H 48M 3S

I think I can now confirm that the first Hyperion was defective. This one lasted a little bit longer and didnt show a rapid drain after 50%. However, the stock battery is still MUCH better.

Overall, the Hyperion batteries seem to be a scam. I heard so many people give these batteries praise, but maybe they were like me and thought they were indeed getting a better battery, when in reality, they were not.

Also, I am starting to think that these Hyperion batteries are actually designed to discharge slower as they are closer to 100% full. I do not know if this is possible or not, but it just seems like they drain slower and then after a point, start to drain much more rapidly. If this is true, then they are designed to trick the user into thinking that their battery is actually discharging slower, thus it being a bigger battery.

==========================================================

TEST 2: Stock Samsung 1650mAh (+NFC)

Notes: I received 4 texts and sent 4 texts

Phone reached 50% after 6H 0M 28S

Phone Reached 10% after 10H 6M 8S

I honestly thought this one would never die!!!! Overall, it lasted almost 2x as long as the 1800mAh Hyperion!!! Also, after the 50% mark, the battery didnt suddenly drain really fast like Battery A of the Hyperion set.

=============================================================

TEST 3: Bluegeta 2300mAh (-NFC)

Notes: I got no texts or calls

Phone reached 50% after 4H 52M 57S

Phone Reached 10% after 8H 24M 43S

Well, we seem to have some good news and bad news here.

Bad News: This battery is DEFINITELY not 2300mAh :C

Good News: It still lasts a long time and seems to work pretty good. It is definitely worthy of being a spare battery for our phone :)