I got my Seidio battery yesterday and put it on the Seidio charger all day and overnight. Put it in the phone this morning.
Since I just put it in, I don't have a lot of experience with it yet, but I can already tell it's going to blow away the OEM 1300mah battery. When I unplugged the OEM battery in the morning after charging, it routinely dropped from 99% to about 92% within 15-20 minutes. That was with almost no usage at all. Maybe checking email once or twice and making a one minute phone call. Seriously.
With the Seidio this morning, my battery indicator showed "100%," which I had never seen before on the indicator! After about an hour of moderate use, it dropped to 99% and now, three hours after it came off the charger, it's at 92%. I'm pushing exchange and gmail. I never have wifi or gps on. I've made a couple of 5 minute phone calls, checked email regularly and surfed the web a little.
So far, so good. I ordered the battery on Sunday from
Seidio - Your Single Source for Premium Smartphone Accessories, paid for next day shipping and had it Tuesday morning. I've used Seidio batteries for years with my Blackberries and I swear by them. I have also used their plug-in battery-only charger for years as well and that thing has been awesome for me. Can't say enough about the company, and, no, I don't work there.