To charge, depends on cell composition. If were talking lion for both 1.3 and 2.4ah, then yes, but it will take twice the time to charge it.
As for using it in the drill, is not that simple. You really have to do some research, and find out where exactly the voltage cutoff circuit is located. If it is in the battery for both the 1.3 and 2.4 ah, then go ahead. But if the 2.4 ah is designed for another model which has the low voltage cutoff and monitoring circuit inside the drill body, then you`ll fry the batteries the first time you`ll use them, as there will be nothing to shut them down when the voltage drops to a critical level.
In 99% of modding like this, there is something to go wrong. Unless the 2.4ah battery pack isnt designed as a direct upgrade for your drill, you`d be better off selling your drill and getting the one you want with a better battery.