ESP32 RTC current too high(max to 100uA)

[hbw0123]

Hi Guys,
I am using the ESP32-DOWD mcu, but found a big issue about the RTC.
1.We use a supper battery to provide power for RTC, but found the RTC current is too high, can up to 100uA. Can you give any suggestion about it?
2.We read the datasheet about the ESP32, but not found the input voltage range about the RTC power, could you tell me?
3.We plan to use ESP32-WROOM-32D for development, but the RTC_VDD pin connected to the VDD3.3. So we can't use a battery for RTC power. I think it's very stupid design, do you have any suggestions if I want use the ESP module? Or can you disconnect the RTV_VDD pi to VDD3.3 ?