The new 6400-70 AC Module allows the LI-6400 to be powered from mains power. It consists of a transformer and a separate battery-shaped unit that fits in the LI-6400 console. When used with a battery, the 6400-70 will trickle charge the battery, which also provides for continued operation in the event of a mains power failure.
6400-70 AC Module
LI-6400XT System: Photosynthesis, Fluorescence, Respiration