2400 is new stuff compared to what I have lol.
I've got a Trinity Heavy Metal 3000 pack I brought back, it still ripps.
That thing cost me $65 BITD.

I also have a Reedy MR A's 14T triple that seems to have exceeded the capacity of the Novak Explorer 2 ESC I put in the RC10T3 lol, it cuts out a little bit with the 4600 7 cell Traxxas pack.
Tons of other old elec stuff that still works here, I have a 1200 pack I use for the rotostart on the Savage but I have a good tune so it don't take much juice.
Got a few 1500 packs and a Radio Shack 2000 that I use too.