1500 mAh is you relative capacity - when it discharged "to the end", it calibrated itself. Now, 900-something mAh is your "design capacity", as reported by resistor, and of course, is total BS. It shouldn't be ever, even for a second, considered as any reliable source - either default, or, IMO, even optional. But, for that or this reasons, it is default for max capacity (you *should* be able to change it to bq27x00_battery data, but it doesn't seems to work right now, see my bug report).

Now, AIUI, the "fake" battery full report (green diode and all stuff) is because new applet reports full battery as soon as it reaches fake 100%, i.e. 900 mAh. You could check it using BNF (from repos, shameless advert ) to see if your battery is really full, when it says so. I bet that when you seen green diode, ti was still chargin @ ~200mA rate, and it would do so, until real full - ~1500 mAh - is hit.

Cheers,
/Estel