Kenwood TS-50 S TS-60 S TS-140S R-2000 DRU-2 Memory Back-up CR 2032 Battery.
JVC/Kenwood 881Z76-7266-72
Kenwood TS-50 S
Immediately after replacing the Lithium battery you must cycle the radio ON then OFF. Failure to follow this procedure will result in premature failure of the battery. If the power is not cycled ON then OFF the microprocessor will immediately begin drawing approximately 1 mA of power from the Lithium battery, resulting in poor battery life.