Seidio won't solve anything... see the other thread here....
Unless it's a different size, it's going be EXACTLY like the oem in the same form factor.
THe OEM battery is around 1400mAh. The Sedio is 1600mAh. That's an increase of 200/1400 or 1/7. That's not very much.
The extended battery is 2750mAh, or nearly twice the stock battery's capacity. It should just about double the useful time of the phone.
But here's the thing: A device's power supply SHOULD be sized based on its expected usage over the course of a day. Ideally, it should have a 24 hour life with nominal usage, just in case the user forgot to put it on the charger the night before.
Personally, I'll have my phone's screen on somewhere between 2 to 4 hours a day. (I read. A lot.) Let's bump that to 6 hours to account for listening to music during drive time.
The iPad can run full-tilt for 9-10 hours. The Xoom can do it for about 6-7. The Galaxy Tab can do it for about the same as the Xoom. Is it unreasonable to expect 6 hours of in-use time and 18 hours of standby time? HTC advertises this phone as haivng a talk time of 6 hours and a standby time of more than 100 hours. All we're asking for is the device to operate as advertised. Is that really too much to ask?
I understand arguments about "managing the device", but you shouldn't have to manage the device. The operating system is certainly smart enough to turn things off when they're not needed, and the device should come from the factory configured for optimal power usage. Mr Joe Six Pack shouldn't have to go dig out a power management app that may or may not work, and he shouldn't have to go all over the place on the Internet trying to learn the mystical secrets of power management.
A cell phone is NOT just made for geeks. It's made for everyone, and everyone should be able to pull it out of the box, put in a battery, and just use it. If it requires a BS in Computer Science just to operate the thing, then it's failing in its mission as a piece of consumer electronics.
Personally, I'm going to give my phone until next Thursday, and then I'll see if I can stretch a full day's use out of the OEM battery. If not, it goes back to Best Buy, and I wait for the Bionic. If things DO get better... well, then I'll be very happy with what I got.