In the world of rapidly growing drone industry and RC (Radio Control) community, the electrical propulsion system (Propeller, motor, Speed controller or ESC and the battery) for little electrical unmanned aircraft has developed extremely quickly.
If we observe the EPPG's propulsion system, it's basically straightly comes from the drone/UAV industry. This also means that there is PLENTY of up to date and invaluable info available out there in different forums and there's no need to ''reinvent the wheel''.
I would like to present just one
out of rcgroups.com providing the very BASICS in Lithium Battery world.
P.S. Don't get me wrong, I know the thing is to build EPPG DIY-way and this forum is the place to concentrate the specific info in this particular field. However, this requires A LOT of in-depth knowledge and there is no better way than finding it, sharing it and suggesting each other.