2P will put a LOT of strain on battery etc. Recall its I^2 * R, so 10A = double heat of 7A. Finally, at 5A or higher load, the 3.6V*3000mah = 10.8Wh, will be more like 9.5Wh due to waste heat from internal resistance. So, 13s2p = 250Wh. 13s3p = 375Wh. 13s4p = 500...
Unfortunately, she can't quite recall where those might have been. But the morels are out there, or soon will be. And even just the search for them is enjoyable. It provides me with a chance to once again explore and discover the wonder of this Island, while at the same time ...