Here is some information that may help, and taking proper care of your battery will make a big difference to how it performs for you and how long it lasts.
A Base (230Wh) SmartPower battery on a normal course taking an average over 600 rounds in every imaginable different weather and course conditions with a 14kg bag, using on average (135Wh) per round
The MAX (307wh) battery version on a normal course taking an average over 600 rounds in every imaginable different weather and course conditions with a 14kg bag, using on average (135Wh) per round
Just like an electric car, the range of your carts battery will vary. Factors like the weight of your bag, course terrain, low temperature, and ground conditions all affect range. Heavier bags, hilly courses, cold weather, and soft ground all require more power, which will reduce the number of holes covered on a single charge.
You can maximise the number of holes your battery will give you by always fully charging it before every round, not storing it in extremes of temperature, and not overloading your golf bag.