Cheap extended batteries

[kzibart]

Amazon has several extended batteries for next to nothing ($7 to $14). My wife wants to get one for her Mogul, but I'm a little hesitant to buy one of these. Can anyone here attest to their quality, or should I spend the extra and go with Seidio or another more trustworthy brand?

Also, while I'm at it, what's a good hard case that supports extended batteries? I found the thread on the Seidio one, but the link took me to their main site and I couldn't find the actual case anywhere.

Thanks.

[drewcam888]

I have always bought cheap batteries from Ebay with no problems but not for my 6800 yet. I have had one fail where one cell in the battery seemed to die. I had no problem buying a new one since I still wasn't paying OEM pricing still.

[Bunsen Honeydew]

I bought one a few months ago and it has recently started to expand when it gets hot. This morning when I unplugged it from my laptop, the battery door popped off. Needless to say, I have another one, from another manufacturer, already bought and on the way.