We present preparenovonix, a Python package that handles common issues encountered in data fles generated with a range of software versions from the Novonix battery-testers. This package can also add extra information that makes easier coulombic counting and relating a measurement to the experimental protocol. The package provides a master function that can run at once the cleaning and adding derived information, with fexibility to choose only some features. There is a separate function to simply read a column by its given name. The usage of all the functions is documented in the code including examples. The code presented here can be installed either as a python package or from a GitHub repository.