NiCad going back in the '80's, when I started the hobby, with T.A. RC10. '90's the beginning of NiMh. less then 10 years lipo's, started with aircraft. NiCads low in mah(2000-2200mah), good for messing around on street and bashing. Lipo's more constant power, longer Time, charge up anytime, as long as it doesnt go lower than 3v, I set my ESC for cut-off at 3.2v on 2cell lipo's. Just remember Manufacture say 3v, when you run them down to 3v, its the average of cells you run. Running down to 3v, one of the cells may be at 2.95v or lower, may get a low voltage error on charger.
I trashed the nicads. The only Nimh I use for the nitro Starter box. Lipos on my Model aircraft first, the my RC cars.
Have Fun!!