Shouldn't mine BTC on laptops. Definitely shouldn't mine LTC. They usually aren't designed to dissipate heat quickly enough.
Low hashrate for a mobile GPU should be expected. 4.5MH/s does seem kind of low, though, if that's what you meant.
even at 10 times that rate that's only 0.0007 BTC a day - I am not sure that would even cover the electricity cost (about 6 cents worth of BTC a day at current exchange rate - and that is for 45 MH/s)
4.5 mh/s is about 6/10's of one penny a day in BTC or $2.19 a year if the difficulty never goes up again and the exchange rate stays fixed. I dont mean to be a party pooper but 4.5 or even 45 mh/s will not be much other than a proof of concept.