Just got my 2600 and was super pumped. I had one in my palm pre and it was a life saver. I plugged the battery in as soon as I got it and tried powering the phone on. I got nothing. Figured it needed an entire charge. So I put the other battery back in. Went home. Put the Seidio back in, and plugged it in. And I got a question mark. Figured maybe something with the battery, so I let it charge overnight. Try to turn it on this morning. Still nothing. I don't know if I got a bad battery or what. I did some experimenting. The X won't turn on with the charger alone. I tried turning it on with the Seidio battery, and it will fire up. But I get the red light at the top, and the bar across the top has a question mark when powered on as well. As soon as I unplug the charger, it dies right away. So, it is getting whatever connection it needs to fire the phone up. But will not charge. I made some obervations. The oem battery conncetors are flush with the bottom of the battery. Whereas the connectors on the Seidio 2600 are recessed up a little bit. Secondly. The cover for the oem battery has an extra metal tab on the bottom of it. Whereas the 2600 Seidio has nothing on the bottom of it. I'm wondering if this connector has something to do with the charging of the battery. The oem case says specifically to not use with the other battery. Any thoughts or opinions?