Good Evening, I notice that the safer, newer Li-Mn batteries are on deep discount from Apogee. Unfortunatly, on September 4th, they sold and they no longer have intentions of serving the hobby community. I bought one of these: http://pfmdistribution.com/secure/shop/item.asp?itemid=243&catid=60 It is really just a test to try something different. There is another manufacturer that makes the Li-Mn batteries, but they want over $90 for an equivalent pack Apogee is dumping their stock on us at deep discounts. While it costs a ton more than a Chinese battery, it is a newer technology, which I have not tested, but the voltages are the same and they have full compatibility with LiPo chargers I really think LiPo batteries are maturing. Chargers are starting to auto detect cell counts, charge C ratings are getting to be 2 and often 3C, chargers now balance and charge, and we are looking at some batteries in the 30C up into the 40C range, which is getting to the point it is unnecessary to make a better battery as far as C ratings go. I mean, at 30C, a battery lasts only 2 minutes at full rating discharge, and we all want more flight time than that. Basically, it is getting harder to get bad quality LiPos. I remember only a couple years ago a $40 LiPo would puff and not get you reasonable RPM; it just did not work. You had to fly Thunder Power, Flight Power, or some other brand that cost you $60 and up for a 3 cell 2200 pack. Now, you can get a pack for as cheap as $15, which performs better than those $60 packs from 3 years ago, and almost no pack puffs after 2 flights due to factory defects anymore. Even the cheap stuff from Hong Kong stays rock-hard after dozens of flights. A sure sign of a mature technology is the advent of newer, replacement technologies that are still in the infancy stages. For instance, Li-MN batteries are still in the infancy, but their capacity/weight ratio and discharge ratings are very good. There are also the new LeFePO4 packs, but I am going to avoid these until they mature. Their voltages are not even the compatible with LiPo chargers, so it is not a drop in replaceemnt, which the Li-Mn actually are.