Sound Devices XL-B18650 -- Sound Devices’ proprietary lithium-ion battery specially designed for powering the A20-HH handheld microphone. [modal title="HAZARDOUS MATERIALS NOTICE" button_text_opener="SPECIAL SHIPPING NOTICE" opener="button" button_style="alternative" ]Please be aware that US Federal regulations qualify certain lithium batteries as "Hazardous Materials". This qualification carries with it an additional fee of $75 if said items are transported…