A:Answer Hello there, this is Kelly with Dyson. To ensure optimal battery performance, and to also help prolong the life if your Dyson V7's battery, we do not recommend storing the machine in a cooler area, such as a garage. The Dyson cordless should be stored indoors, and we do not recommend using the machine or storing it in temperatures below 37.4°F. You will want to make sure the vacuum is at room temperature before use.
Best wishes,
Kelly
Dyson Customer Support