I'm learning and you are really teaching me. I really thank you for that and there are still very much that I don't understand.
There may be really trade secrets in the battery, or said so by the different manufactures. When I look from the engineering stand point, in the core of Dewalt battery is just a package of power cells made readily available to the public by other companies such as Sanyo, Samsung .... These cell are one of the best out there and the specs of those cell are designed by the battery manufactures, not a secret sauce that made up by Dewalt.
Dewalt just simply integrates one of the best batteries into their package. I hear you said but I think it's just smoke and mirror that you said they have magic way to use the cell battery better than it was designed for. Admittedly, Dewalt makes kick butt tools but it's the motor in drill that deliver the power and the drill simply draw needed current from the battery.
When I tried Dewalt drill with a Milwaukee M18 battery or a Makita or a Bosch battery, the drill work the same way. There's no magic here in the Dewalt battery.
Agree that you are very right about the state of the market for portable chargers. The market is saturated with low end portable charger products and none of them really stand out. At this point, all I can do is trying to make the best device, not one of the same as the crowd and let the consumer figures out which one they want to buy.
I think we really got a very good discussion that many of the readers will find it very interesting to read and I salute you for following up with a new bee like me. Cheer and let all try to make better tools for the customer.