HMMM, always the day after you receive something. I just received 3 packs, a 5000mah 40c 3s hardcase, and 2 5300mah 30c 2s. All the cells were balanced out of the box. I've only ran the 3s once in a vehicle that I haven't run any other 3s's in, so have no opinion on comparable performance, but it seems strong. Getting ready to go for run #2