I bought one of these which killed one rat a night for three nights, then stopped working. I bought a second one which killed, so far, 18 rats and 7 mice on one set of batteries. I just tossed a little cracked corn on the floor, and a little more in the trap. Takes about 10 seconds to empty and reset.
https://www.amazon.com/gp/product/B08DCNF1ML/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
https://www.amazon.com/gp/product/B08DCNF1ML/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1