Apex Rechargeable Lithium Ion Battery Pack. • Charge time: 3 hours • For use with Apex Rechargeable headlamp Not compatible with Apex, Apex Pro or Apex Extreme Read More Apex Rechargeable Lithium Ion Battery Pack. • Charge time: 3 hours • For use with Apex Rechargeable headlamp Not compatible with Apex, Apex Pro or Apex Extreme