Compatible with Digitrak ® and Ditch Witch beacons. These batteries have 2 to 6 times the capacity of two alkaline C cells in series (up to 120 hours for DX transmitter, 240 hours for DT transmitter) Will be more reliable than two C cells welded together. Much better voltage hold-up during discharge than alklaines. They will not leak because of a single welded steel shell.