ADC 5560 Rechargeable Handle for Diagnostix 3.5v Desk Set Handle with batteryDiagnostix 3. 5v Rechargeable Battery Handle features: C sized handle with 2600 maH rechargeable Li ion battery CNC machined from solid brass, the handle is chrome plated in black with a ribbed surface for a sure grip Adtronic electronic reostatic light intensity control provides infinite continuous control and auto off feature after 2 minutes Bayonet instrument mount is compatible with all major brands of 3. 5v instrument heads Li ion battery provide