New paper suggests that alternating polarity of pulses requires less current to maintain loudness than a constant polarity order.

We have a new paper out that demonstrates a method of reducing power requirements to reach a comfortable loudness with a cochlear implant. If implemented in a cochlear implant sound processing strategy, it could potentially lead to significant battery savings.

Todd, A. E., and Landsberger, D. M. (2018). "The effect of polarity order and electrode-activation order on loudness in cochlear implant users," The Journal of the Acoustical Society of America 144, EL112-EL118. pdf