UPDATE.....If you buy an out of warranty replacement pod, it will carry a 3-year warranty. If you buy the refurbished unit, it will carry a one year warranty.  The batteries are $30 and can be purchased through either the repair center or your dealer. You do not have to send in the old battery, but she did recommend that the repair center do the replacement. It wasn't required, only recommended. You cannot buy a replacement pod without sending in a defective unit.