Read this thread about another extended battery :
# Q: Actually, the battery is based on the "blacklight" function you have.. I used to have "blacklight" always on, and display time of 2 minutes and it will run out in about 1 day... now I have the "blacklight" (auto-adjust) off, and run about 20 seconds time, and it can last for 2-3 days, even with emailing, checking internet, playing games.. I think that is the feature that most people miss.. Your battery is good that it allows 25% boost in energy, but of course 2400mAh (+71%) is much better.. with 2400mAh, that will last one whole week without needing to charge =)
A: Thanks for your input. I'm sure someone else will find this helpful.
# Q: My battery goes from 100% (not charge throughout the night) from 8pm last night, to 1pm today, and battery only dropped to 75% (17 hours time).. this is with backlight "off" and 20 seconds display time.. 17 x 4 = 68 hours (almost 3 days) =)
I bought the battery (they said the battery was 950mAh, but actually I looked ALL OVER the internet) and saw that the battery was 1400mAh.. so this extended battery gives 25% boost..
right now, I am able to get 68 hours (3 days) if I set the backlight to "auto adjust" and 20 seconds.. about 24 hours (1 day) for backlight to "always on" and 2 minutes display time..
I ordered the battery and will see if it is better than original... The Seidio is too slow to come =( with 3 days + 25% boost ==> 4 days.. one day improvement is better than nothing for now.. with the proposed 2400mAh, that will give a boost of 71% , SO 3 days + 71% boost ==> 5-6 days... a whole week without charging.. and frequent use (3 pushed emails, downloading , and playing games) that will be nice =)