LOL something else to charge at night, I mean come on how else is it going to use electronics to read a finger print or have bluetooth, so it requires a battery, forget to charge it and you might pass an embarasing moment not being able to get at your wallet in a restaurant or some other place you are trying to pay, uhm sorry my well protected wallet ran out of battery and can't read my finger prints to open up, could I come back tomorrow and pay? Well sir you could do the dishes LOL