It's very much possible even my friend does it, what is wrong about mining on a laptop is don't mine on a laptop without removing the battery it will eventually degrade your battery life and it wont even survive 30 mins if want to do some work other than mining unplugged.
Actually mining using a laptop is not good, I don't think you will get perfect results, maybe your friend did it, of course he uses a mining platform and needs a hash, after all this hash determines the performance of your laptop's CPU/GPU, and maybe mining work Bitcoin on a laptop is not profitable, although removing the battery component from the laptop doesn't mean it's good, I think it will affect the hardware of the laptop.
It's better to avoid it, and it's better to be safe, we think that mining Bitcoin with a laptop is not a good thing to do, it's better to try it with an ASIC, ASIC itself has been recognized as having special performance and is good for mining Bitcoin.
