This is difficult to quantify, as depends on individual system, battery and useage.
May I suggest you test for yourself by installing ZorinOS alongside Win11 as a dual-boot. Then you can run ZorinOS yourself whilst keeping Win11 intact if you discover ZorinOS battery use not good.
If you have not yet installed ZorinOS, I will point you to this pre-installation advice that may be helpful. Before you install