No it would still be a 4000mah battery. I would suggest running a single pack though its less wiring and less of a chance for something to short out or plug something in wrong. I think for truggies 5s with a 1550kv is the way to go. That's what I ran last week and it was incredibly smooth and ran cool and only used 3200mah in the 10min mains. I was using a 5000mah 5s but could easily go with a 5s 4000mah.