Seidio New 3500 Battery Issue

[Midntsol]

So I ordered a Seidio battery last week and I've been waiting for it to arrive(like a kid waiting to go to a toy store). Well it arrived today and I couldn't wait until it was charged. I have two 6800's (long story), so I charged it on my spare 6800 and waited for the initial 8hr charge. After it finished charging I placed it in my new 6800 and it wouldn't power up, so I placed it in my older 6800 and it powers right up. I'm able to swap both of the oem batteries between the two phones with no problems. I've checked and all terminals are making contact. The only different thing between the phones is a number below the s/n number. The old phone has "CS003-00 C" and the new phone has "CS003-00 G". When it's placed into the new phone the light just goes red(as if it's not finding a battery). I'm going to call them on Monday, but I'm hoping someone may have an answer. Thanks