Remember to keep your arm down for those few days. It's not as difficult to recover from the replacement as having the original put in but you still need to give the incision time to heal. Good luck.
Thanks ireneo, I'm actually going in today to get mine replaced.
My Dad's ICD/pacemaker battery got "low" but it didn't create any symptoms. The only way he knew it was getting low on power was from his doctor interrogating the unit. They're not the same as a flashlight that gets dim as the batteries wear down.