The low power (pointer)laser power ratings are usually inaccurate. The output can be raised by changing the value of a resistor - details on many YouTubes.
But, without exception, the optics (focusing) on these low end devices are very poor - usually of plastic.
On our KonTum laser range, up in the mountains, we can place a laser under test and examine a target that can be moved about a kilometre so we can examine the beam dispersion caused by poor lens.
Our high-end lasers (100 Watt++) use glass lens and the dispersion is minimal but the 'burn' effect is still minimal at distance over 1000 metres.