Gorillamaxx360: You're backwards on the pack wiring. Wiring packs in series adds the voltage and wiring packs in parallel adds the capacity.

For example: 2x 7.4 volt 8000mAH packs wired in series would be a pack with 14.8 volts and 8000mAH.

2x 7.4 volt 8000mAH packs wired in parallel would create a pack with 7.4 volts and 16000mAH