suggestion: protection for battery reverse polarity

[ergodone]

My understanding is there is no protection for a reverse polarity battery connection in the current design. I think that would be a useful addition since there seems to be no standard for the orientation on the battery connectors (at least the batteries I ordered did not match my adafruit feather).

PS - This project is great!

[ebastler]

Thanks! That's a good point indeed. Most Schottky Diodes would cost ~.4 V though, which lowers the amount of energy that we can pull from a battery by quite a bit. Also, a simple diode would not allow for charging, and confuse the charger IC. I'll have to come up with a different idea... Maybe just a simple fuse + diode crowbar circuit to prevent the electronics from catching fire.

The charging circuit already has a small flaw (If the board is left for multiple hours/days connected to a charger, with LEDs running, the charger will not correctly determine end of charging, and hold the battery at 4.2V which will damage it over time). Workaround will be implemented.

[Percentnineteen]

Could use a channel mosfet between By and GND with B+ as the gate. I think it's done that way in mitosis