HIGHLIGHTER® Vapor Battery typically lasts for an entire cartridge on a single charge. The battery capacity is 280 mAH, and it operates at a range of approximately 3.3V-4.2V. The resistance of the cartridge is approximately 1.9~2.1 Ω (ohms). The maximum limit is approximately 2.0A. Do not use high-powered batteries with Bloom Farm CBD cartridges.