Gone are the days when we used to get battery changed for the wrist watches. (indabaa.com)
Cons: Slow boot after battery change; confusing the first time Some think the reader is defective - hold the power button in for 5 - 6 seconds. (newegg.com)
It uses plug - in power, so you don't have to deal with low batteries and constant battery changes with heavy use. (geekwrapped.com)