I am using STEVAL-STWINKT1B.
I want to connect the battery that came with the STEVAL-STWINKT1B and keep the time information (RTC), but it doesn't work.
Even if STM32L4 is shut down (HAL_PWREx_EnterSHUTDOWNMode ()) with the battery (VBAT = 3.7V @ measure J4) connected, VBAT reaches 3.0V in about 3 hours and the battery manager stops supplying power to STM32L4. Even if JP6 and JP9 are removed and the power supply to the sensor and BLE module is cut off, the situation will not be improved.
Please help me
