... Dental Head Lamp We've just put forward newest bigger lithium battery which can work continuously for 12 hours, and provided ... optional.♦Charge voltage: AC:110V / 220V, DC:3.4VAdvantage:Using the rechargeable lithium battery, have the advantages of light weight, longevity and ... for all kinds of surgical operations. Old style black battery: NEWEST 3W Dental use LED lamp with Rechargeable Lithium Battery