Palmer PAL-PBC400AA Professional Rackmount Battery Charger - 19"Keep your microphones, in ear monitors, effect pedals and other battery powered devices operational at all times with the professional 19" Palmer BC 400 AA battery charger. It is controlled by a micro controller and charges up to 16 AA or AAA batteries at the same time, including a combination of each. Charging stations for two 9 volt blocks are available as accessories, and can be combined as needed with the AA AAA charging stations. The Palmer 19"