LiFePO4 Battery Pack for Yaesu FT-857D

I am playing around with the idea of using LiFePO4 batteries for my Yaesu FT-857D. Since I have access to some pretty cool software, I thought I would model up my radio and try some simple permutations.

Large Prismatic type, 20 Ah

This image above shows the large plastic case style. These cost around $35 each and have an energy density of around 85.33Wh/kg.

Polymer Type, 20 Ah

The image above shows the foil packed polymer style cells. These cost around $60 each and have an energy density of around 125 Wh/Kg.

The typical discharge rate is the same for both types, 20 amps, but the peak discharge (<10 seconds) is much higher for the prismatic style (200 amps) vs the polymer style (40 amps).