• Batteries for microphones: 

      1. Original gray sound system microphones--use ONLY rechargeable NiMi batteries (can be purchased from Staples or Amazon)
      2. Small black Redmike sound system microphones use a special "sensing" battery, available only from Lightspeed, and you have to create an account with Lightspeed before you can order.  Link to the correct redmic battery:  https://www.lightspeed-tek.com/product/NH2A27/
      3. CES, room 220 has a unique microphone, Sharemike with a unique battery that also has to be ordered from Lightspeed. Ordered replacement and extra 2019: https://www.lightspeed-tek.com/product/2-aa-nimh-rechargeable-battery-pack/