Over the past couple of months, we have been working on a "smartification kit" to obtain accurate state of charge for Lithium batteries. Currently most systems use voltage based capacity estimation which is inaccurate and make it hard for flyers to
Batmon helps solve all of the above issues and also automatically discharges the battery to storage voltage after set-time to enhance the life of the pack.
The board currently works with modified pixhawk, ardupilot and arduino firmware. More details about the kit is available here: https://github.com/rotoye/batmon_reader
We also help assemble custom lithium ion and polymer packs with Batmon integrated for your specialized use case.
Please PM me if you'd like to know more details.