OP didn't tell us anything about the project.
Voltage/current requirement of sensors, WiFi near, etc. could influence decisions.
A WeMos D1 mini (no sensors) runs about 7 hours on each Ah of a battery bank (tested 36hours on a 5Ah battery bank). 30,000mAh (30Ah) power banks are common. Should do >200 hours (8 days) on that.
Leo..