No bardzo ciekawe;
W General Desription stoi : "Events can be logged while the device is operating
from either VCC or VBAT."

A dalej
"When VCC falls below VBAT, the device switches into a low-current
battery-backup mode. Upon power-up, the device switches from battery power to
VCC when VCC is greater than VBAT + 0.2V, and recognizes inputs from the system
when VCC is greater than 1.25 x VBAT by releasing control of the write
protection on the I2C bus."

No kuśwa nie rozumiem chyba - to co ma mi ta bateria podtrzymać ??