Actually I am amazed--APC does   LP12060EP.

Here is a link to their online store. More expensive than the tractor, and I think it must be new.

http://www.apcprop.com/cgi-bin/store/agora.cgi?maxp=400&ppinc=6a&product=+

Larry,

Is it the same "C" rating? Just by being lighter, it should translate into a little less power needed through the flight.

I would hope as time progresses, the batteries will get better (=lighter and stronger of course). That's my hope anyway . So if I need new batteries next year because I am abusing the ones I have now, the newer ones will be better. Also why I try to keep to reasonable cost batteries---my 4s2100's for the Nobler set me back ~$65 a pack (one per flight).

One thing to note that the lower the battery internal resistance (higher C rating or also larger battery size), the more power we can get out of it(= less heating inside the battery....). This would translate into using less mAHr out.

Alan

Well you win 3 ways:
1) It is lighter
2) It is larger, so its internal resistance should be less, so you should draw fewer mAHr than in the previous battery.
3) Since "C" is also larger, you win again for same reason in (2)

So net result is your battery should be cooler, less mAHr should be pulled out, and % used should also be better (fewer mAHr/larger capacity). Sounds like a win³ in my book!