Burst Run Efficiency 1 (Source)

The formula is probably just:

Normal Burst Run HAM Cost * (100 - Total Burst Run Efficiency)/100

Basically your Burst Run Efficiency is just a percentage that reduces the cost of Burst Run by that percentage.

Any one else find Burst Run Efficiency to be pretty worthless? It seems like longer duration, shorter time-between-use, or greater speed would all be more valuable but not overpowering.