more than likely
My son and i found quite a performance boost with the stock motor in our Lunchbox/Midnight Pumpkin just by changing from a NIHM to 2s lipo battery
Just a small speed increase but they wheelly like mad great fun
we use a gens ace 4000mah battery in them and these batteries had a rounded profile and fitted straight into the battery tray but not sure on the later type tho
we get 20-25 mins runtime per battery