Actually, Don, now I understand beter WHY it costs $12000 to replace the battery, it is part of a sealed unit, which contains the entire electronics of the stimulator, (this is serious!) Now let's think about the possibilities if everything was made like this! You go to have the battery checked in your car, the day after the warranty has expired, and the dealer says: "Mr. customer, all you need is a new battery, which normally would cost about $75, installed, HOWEVER, in order to prevent corrosion and leakage of the battery, it has been sealed inside the engine of the car, which is welded to the frame of the car body, which prevents vibration from damaging the battery. This makes it impossible to change the battery at all! So, after deducting $18.75 which is the remaining value of the battery, from $24,999.00 for the price of the new car, you owe us only $24,980.25! " Back to seriousness, I really believe that the stimulator and its battery should have a warranty that would at least allow for a replacement at a great discount if it fails in a short time, or they should sell insurance to cover the cost, like a service contract. Say Hi to Vivian+ the family [log in to unmask]