In most cases the cordless phone may last longer than
cordless phone battery itself. In that regard, buying a replacement cordless phone battery may be option to some but not to all. If you do the math, cordless phone battery may comeout expensive and some consumers just prefer to buy a new set of phone instead. The reason for these cordless phone battery to break or get busted so easily is becasue people do not know how to charge these batteries properly. It could be that these cordless phone batteries are maybe overcharged or have been put in the charger when its not supposed to.