Assessing battery performance: Compared to what?

A team from the US Department of Energy’s (DOE) Argonne National Laboratory, University of Warwick, OVO Energy, Hawaii National Energy Institute, and Jaguar Land Rover reviewed the literature on the various methods used around the world to characterize the performance of lithium-ion batteries to provide insight on best practices. Their results may one day lead to more reliably comparable methods for testing lithium-ion batteries tailored to different applications.
Source: EurekaAlert, https://www.eurekalert.org