No, so im on a journey of discovery. On paper, they seem to be too good to be true. Their only downside is the energy density compared to Lipo, but when these things last at least 20 times longer, who cares. Building a monitoring system now, was going to drive to Jaycar to pick up some resistor ladders, but needed fuel in the car. Price is so high right now i think im going to stay at home and code.