I’m shooting with 5D III. When the battery is full, I have no problem getting 6fps. However, when the battery is at half or 1/3 drops, I don’t get that 6fps anymore.
Will extra battery in battery grip helps? Have anybody try this before?
The camera may activate a low voltage warning, which could cause data loss due to failure in writing the card after a sequence of quick shots. I believe that use two batteries can avoid the problem.