Just to put things in perspective, at the current difficulty and BTC price, you'll need about 6 TH/sec (Terahash, aka 6000 GH) to produce $4 per day. That also assumes your electricity is free and you are willing to run whatever hardware you have flat out, 24/7.
None of the above even remotely fits a laptop. It cannot even hit 1/10000 of the hashrate, and it's not built for 24/7 operation flat out. Laptops do short bursts of computation just fine, but not several minutes, much less hours all day. Attempting this will produce literally nothing in terms of BTC, and will shorten the life of you laptop significantly. A desktop might not have it's life shortened a lot, but it's still woefully underpowered.
Read lots of the threads here to see what you actually need if you want to mine BTC.
Even a newbie like me knows by now that the laptop-mining thing is a no go situation. The laptop is going to be destroyed.
Live example of the profits with a simple PC
Three normal (office usage) PC's:
i3, i5, Core 2 2.66Ghz without overclocking
mining in minergate for almost 2 weaks 24*7 with total H/s
https://minergate.com/widget/3ceaa05041858ed4.pngThe profits are:
Monero 0.152897540725
FantomCoin 0.755349797363
In total : 1.85572361 USD
So do your maths in mining with a laptop...
that's very true, even if you have your solar panels that will compensate for your electricity bill..
in the end, you will regret of even trying to think about laptop-mining. a lot is at stake for this endeavor!