The charging circuit on this phone will overcharge the batteries.The phone itself gets extrememly hot. This cooks the NiMH batteries resulting in a talk time of about 20 minutes.Panasonic does not offer to replace the phone. However, if you call their service number and tell them the battery won't hold a charge, then they will automatically and without question offer to send you a free replacement battery. They are cheerful and courteous about this.Expect to have to call them every couple of months for a new battery. I suspect that Panasonic figures this is cheaper than replacing. Eventually, you will get tired of calling them and/or will have replaced the phone with something else.