Power Stacker: Stackable Battery System

Added another style of a case in the details and files where the cells are separated from the PCB.

For all my battery projects, I tend to use the Panasonic NCR18650B but I am considering using the smaller version NCR18500.

Uploaded file for and early concept for Version 2 of power stacker, which uses an isolated ground and a charge controller on each lithium ion cell for connecting in series without an external cell-balancer. It may be best to first target USB powered electronics and connect cells in series then use a switching regulator to step down the voltage. Connecting in parallel and attaching a diode to each pack does reduce the voltage of the pack slightly and every volt saved counts as extra minutes of run time!

https://www.samtec.com/products/umps

These are very early prototype details and of course with more resources it can be fully refined to a finished product.