I bought 4 of these batteries before and one very slightly puffed but hasn't gotten any bigger and I still use it... I notified them right away that it was started to puff and they sent me anoter one right away.. All I paid for replacement was $5.00 and I still have the old one cause they didn't want it back... Supposedly these batteries are made by HighCapacity for Japan and the quality is 'supposed' to be tops... I have never had any trouble except that one battery being just slightly puffed, slightly... Plus its free delivery too... I like these batteries..

http://www.ecpower.com.hk/index.php?...roducts_id=217

I think I may have other links to cheap batteries too but will have to look for them... I know Deal Extreme has Mysteries on sale pretty cheap but personally I won't buy Mystery batteries...

Happy fly'n