lipo balancer q?

[stampy]

sorry for the confusing post :o i posted it when i was half a asleep lol. ok so each pack is just a 3s pack, 3 cells in series to get 11.1 volts. i plan in wireing the two packs togeather with a y splitter so i can run them at 11.1 volts but get incressed run times. do i need to run a balancer on board the truck to keep both packs voltage the same or? now the charger it as to charging ports im going to charge 1 pack on one charging port and the other pack on the other do i need a balancer for the 2 packs even though they are charging basicly on to diff chargers. now the low voltage cutoff should work them sence it is 3s3p total right? one thing i know is that i need a balancer for each pack to keep the cells in the pack th same but, im just trying to save as much money as posable dont wont to have to buy like 6 of them.