I second that, I have an EzSBC ESP32 board [1] that wakes up twice a day to fetch data through WiFi and three standard mini 1.5V, non rechargeable batteries are still going strong after almost one year. The power supply stage is truly the most important bit when it comes to deep sleep power consumption.

[1]: https://www.ezsbc.com/product/esp32-breakout-and-development...