baterry's lifetime reduced due to RTC

[florian]

Hi everyone,

I have a little problem with my circuit.

the lifetime of my battery(Li-on 3V)(+VBat_sense) is reduced due to leakage current. but I don't know why...
can you please help me with this problem?

The batterie is connected to a RTC DS1337S and the I2C of the RTC connected to a PIC 24HJ32GP304.
There is pull-up resistors for the I2C signals between the PIC and the RTC. powered by VCC_PIC (3,3V).

when the PIC is not powered, there is no problem. the current consumption is OK.
when the PIC is powered, the problem appears. If I remove the pull-up, the problem disappear
when 5.0_VDC is activated, it replaces the battery, there is no problem. (PIC become a slave, a processor become the master. before 5.0_VDC, it was the master)

thank you