I am working on a design that I'll use bq2403x or bq2407x in my design. Reading the datasheets I confused a bit. In the presence of AC adapter input or USB input (or both) the devices output a regulated voltage of 4.4 V or 6 V. When there is a problem about the input sources, the DPPM sustains the regulated voltage with the support of the batteries at the defined voltage levels (4.4 V or 6 V). But I could'nt exactly understand, or could not see in the datasheets the case of absence of the both input sources. In the absence of the input sources (both AC and USB are absent, there is only battery), will the DPPM keep the regulated voltage at 4.4 V or 6 V levels? Or will the output voltage tracks the voltage of the battery?