The batteries supply power to the phone when the phone is in standby mode (ie, when there is no call). The battery lifetimes for different models are listed below: * Model: M10B and M10W * Time: Approximately 6 months * Model: M20B and M20W * Time: Approximately 14 months

The information on this page applies to the following models: D6351B/38 , D6352W/38 , D6352B/38 . Click here to show more product numbers  ›