Charging problem in Nokia mobile with different chargers

I have observed something in my mobile which I am certainly sure that my observation is correct. I am writing this to know more about charging behavior of mobile with different chargers. When I try to charge my mobile with less current chargers, they take around 4 hours to charge 100% but the battery drains a way faster in them. But when I charge my mobile using the high current ones, the battery lasts for two days I mean almost double battery life? Is my observation logical? Any reason for this behavior?
