Galaxy SII protective case / extended battery power pack combo

[androidjoe]

7 days of use on a battery? talk about being super jealous... I have to charge after 10 hrs.. Help a brother out? (haven't rooted, just trying to learn how, I'm assuming there's some goodness in having Root access.)
Galaxy s2

[t00dy]

I have got this Power Pack (PP) and i am not pleased with it AT ALL!!! I have done some testings, and here are my findings:

First, when i got the PP (two days ago) i cycled full charge/full discharge it 3 or 4 times, using stock travel charger 700 mA. IMHO this should be enough to reach full capacity of the PP's built-in battery, which should, according to the manual, have the capacity of 1.300 mAh.
About an hour ago i tested it again. I attached FULLY charged PP to phone, which had 48% (792 mAh). Charging lasted for 1 h 25 min, until the phone reached 93% (1535 mAh). While charging with PP, i had screen, WiFi, 3G, sync OFF (maybe it would be better to put it in airplane mode). So the PP was only able to deliver miserably 45% (743 mAh). That's rather far from theoretical value, which should be about 1300 mAh or in other words PP should be able to charge the phone from 0% to 78%, if you to the math (1300/1650=0,78)!!!

I don't know if my power pack is defected, or if this should be like this. But to me 42% efficiency seem VERY small, that is why i will contact Samsung, and present them with my findings while demanding my money back!

[sophiemith]

it seemed too heavy after putting it on~~~

[koreanstyle]

hi ,where did you buy yours? i wanna try as well.

[mauricio.alan]

Hello Im very interested on it

where can I buy it online for USA.


thanks

[s76x]

Hi to all
I've buy the battery power pack (EEB-U20BBUGSTD) for my SGS2...but I don't understand a thing, I don't see a power on/off on the battery pack! I had a same battery pack for galaxy s where there was a turn on/off for activate it, but here? isn't there?? I don't understand, the battery pack continue to recharge the phone until the power pack is discharge?? so I've to take the power pack always with me but separately from the phone because when I put on it the phone is always in charge?