I am about to purchase a new 5d mk4 body and I normally purchase from B & H. All my past older Canon bodies from this company all came with a Canon brand battery. Their current selections only come with a Watson brand battery. From other posts i have learned of the screen prompt on the 5d mk4 that asks if you have inserted a Canon brand battery. I have no problem purchasing a Canon battery, but should'nt this be standard with a new body? Am i relegated to simply not using the new Watson battery that seems to be the only brand that is shipped with this body, in order to retain the proper Canon warranty on the body? Thanks for any input from current 5d mk4 users that may have also questioned this before or during their purchase.