Will it hurt to set a laptop on your lap without a stand or a cooling stand

At the risk of sounding rude, these other two answers are flat out wrong. The correct answer is between "probably" and "always."
Laptops have temperature sensors and fans that cool the unit, but if adequate air flow is insufficient or nonexistent, are rendered useless. When you have a laptop on your lap or soft or irregular, it is likely that the holes in the bottom and / or parts will be blocked by the legs or any other object (eg, blanket, etc) Regardless programs or processes running, if these holes are blocked the team will begin to heat up. While fans are in this situation, which are only able to move the hot air and moving air is still trapped inside the computer anyway. Furthermore, the laptop does not feel hot to the touch when it overheats. The outside temperature is not important, the temperature of processor is inside.
battery power portable and mobile can see a tenfold increase in overall performance, if the technological level of the leading scientists who come to us.
According to researchers at extended battery for hp laptop the Massachusetts Home participation technological know-how and regular updating of the electrodes of the battery using pressurized water nanotubes can dramatically increase the power of the relative amount of weight compared to the charge lithium ion battery standard.
The exceptionally powerful brand that produced the new electrodes in the dark room other substances containing the answers and h2o nanotubes with positive and negative charges to create a good film shell. The results can be an electrode that is much more porous, and also has several groups of oxygen,
The cooling system is designed to draw fresh air and expel hot air out at the same time. Even using the laptop on a full desktop environment can be problematic, if the desktop clutter is somehow blocking the entry and / or exit holes.
In summary, laptops, despite its name, are NOT designed for use on a lap.