Lithium backup battery for the MK-1/MK-2 and MK-6/MK-6Solar Control Units. Powers display and memory on units when not connected to main power battery.
For MK-1, MK-2, MK-6, and MK-6 Solar control units only.
Legendary and Reliable Deer Feeders and Timers Since 1979 - Made in San Antonio, Texas, U.S.A.