Estimated time 'till end of battery, active use (usage with the same current as right now, to be precise) / standby. During charging, it's the same, but untill battery gets full.

If using bq27x00 module, those estimation should come directly from charging chip. Well, at least the "active use" one, as I have no idea how it calculates the "standby" variant and it seems overestimated.

Chip gives only remaining times for usage @ actual current for usage @ average current used since last charging, and it is what BNF reports. Maybe battery applet take clculation based on lowest current used, from somewhere? No idea, as said.

Now you caould say "thanks" to me for all this BME Replacement related info, by editing the heavily outdated wiki page and stuffin' it up with what I've written in all those posts

Cheers,
/Estel