Insight into technical details for Li-Ion Charging - MCP73861 Chip Data Sheet

[ted.lowe]

In a reverse-engineering sort of way, one can glean a good amount of detail by reading this chip's datasheet:

http://ww1.microchip.com/downloads/en/DeviceDoc/21893c.pdf

These chips can be had for $1.38/ea in volume (hint hint:-)