1w seems a little limited? A cheap baofeng is 8w.
Those cheap baofeng's are illegal to use where I live on most of the spectrum they can operate on. Illegal to press the talk button anyway.
So maybe the 1w is also a regulatory issue.
1w is usually okay and using 8w from a phone is probably way too much power demand
Only on the paper, the real power is around 3/3.5W