![Image](http://www.rccagallery.com/albums/Lee-Liddle/Li_ion_cell.jpg)
This is the Konion cell made by Sony. There are supposed to be three versions. The 1200mah, the 1600mah (picture), and a 2600mah.
This cell in 11/16"in dia and 2.5" long.It weighs 43g (aprox 1.5oz). It is a long thin cell which does not lend itself to high charge/discharge rates. It is supposed to be a 12C discharge and a 2c charge. So far I find it to be "happy" at about 15a discharge which is about 10c. I was expecting 18a (12c), but 10c will give good long flights.
It comes from the Makita 18v 3ah battery pack. There are 10 cells setup in a 5s2p arrangement. Cost is $99 off the shelf at Home depot (about $60 on Ebay). So the cost per cell is $10 ($6).
Since the big outrunners that many are running in 3696 draw about 16a, I thought that this might be the perfect match for 3696. However these cells seem to get too hot, and their voltage dropps too much at 16a. I did not give them any break-in time and got the first pack pretty hot, so I may have reduced it`s ability somewhat.
There was not as much info out there on this cell, so it was a little trial and error. In fact there was some incorrect info which caused me some probs at first.
A post on RC groups says that these are to be charged to the same 3.6 max as the M1 cells, but that`s wrong. These are 4.1 or 4.2v cells and can easily be charged on a regular LiPo charger.
I charge my "test dummy" pack at 2a now, and the last time it took about 1550mah. For a while I thought that I had a 1200mah pack, but now I see that they are 1600`s.
A 3s pack weighs about 5,25oz which is a little less than the 2000mah commonsense batts.
The only draw back is the lower (13a) discharge ability. This can be overcome by using a 20mm innrunner motor on a gearbox. Cash is using one and is only drawing 13a at 9k. I have had similar numbers in some bench tests.
Like the M1s, the main advantages of these cells is safety (charging and impact), faster charging(2x as fast for these cells) and longer life (up to 10x longer)
Cajun, these may be the 3696 cells that you are looking for, but you will have to run a more efficent motor than the 2809.