Yes, the RCU (real-time clock unit) in those are not that great. Of even greater concern is that the phones that are used on that system, the 1410, 1412, 1414, and 1418, have BAD button pad problems. In a heavy use situation, the buttons will start to fail after about 2 years. Replacement button pads are availavble and fairly easy to swap out. Just be aware that you will have to start pushing the buttons harder and harder as time goes on. This situation is worsened by humidity. I would make sure that, every spring, you have a supply of replacement button pads on hand.