The latest revision 0.7 uses a Cortex M4 MCU instead of a Cortex M0+.
This even further reduces quiescent current: The total sleep consumption compared to rev 0.6 is reduced by 1 µA under typical conditions.
Total quiescent current @ different voltages, room temperature
|Input Voltage||Quiescent Current|
|0.8 V||2 µA|
|1.0 V||1.56 µA|
|1.25 V||1.24 µA|
|1.5 V||1.02 µA|