Lumohs Battery Pack with 8 replacement battery cartridges maintains consistent illumination for Lumohs MD no. 3 scalpel handles in spa, med spa, esthetic, and clinical settings. Each cartridge supports approximately 4-5 hours of continuous light output, giving one pack up to 2,400 minutes of runtime depending on usage. Stocking multiple packs supports uninterrupted dermaplaning workflow, reduces mid-treatment power interruptions, and simplifies battery management for busy treatment rooms using Lumohs handles. Read more