Burner phone's don't have a lot of capabilities from my understanding. They can go days without a charge sometimes week's depending on how often they are used.
Since burner phones are feature phones, they are severely limited in their abilities. Most lack cameras or access to a modern browser, and are instead limited to phone calls and text messaging. Since they are relatively lightweight devices, they have excellent battery life, too. Many such devices will last for days on a single charge, and sometimes even months if you use the battery sparingly.
https://www.howtogeek.com/712588/what-is-a-burner-phone-and-when-should-you-use-one/
I disagree. Tracfones are considered burner phones and have many that are full featured. Even the simple flip phones have cameras. (I have one)
Phones | TracfoneStore