How long could my radio battery last?

Many people always ask, “After my walky talky is charged fully,how long could my radio battery last?”
It relates to the frequency and circumstances you use.Usually it’s 8 hours to 12 hours standby time.

But if you transmit and receive more frequently,it’s less than 8 hours. however, if you hardly use radios， it could last more than 16 hours.

Just like your phones, right?