A. To improve battery life, avoid using the device at maximum temperature settings, as this can drain the battery faster. Instead, use lower temperature settings that still provide satisfactory vapor production. Additionally, ensure that the battery is fully charged before each use and avoid letting it drain completely, as this can shorten its lifespan.

B. Consider purchasing a spare battery if your device allows for it. This way, you can swap out batteries when one is depleted, ensuring you always have a charged battery ready for use.