The purpose of this study is to investigate how resource demand and climate impact from electric cars can be reduced by aiming for more resource efficient battery sizes and charging strategies that takes into consideration the use patterns of car owners and the availability of charging infrastructure. A comparative environmental assessment is performed for a set of use cases representing different owners of battery electric cars. The use cases include batteries of different sizes, chemistries and charging possibilities, including battery swapping where the user can change the size of the battery depending on the trip length. The results show that the configuration with the largest battery and NMC chemistry has the highest climate impact as well as resource demand in a life cycle or system perspective.