Very good product I recommend, recharge a battery while the other is used by the phone is an excellent method to save its battery because there are some guidelines to follow: Do not use the battery for charging it Do not make refills retouch Observe the battery recharge cycles (once emptied, filled to the end) Never go below 10% of battery (make load between 10 and 15% is best) This system also allows users to charge a battery in the car while you use your GPS on the phone, and without damaging the phone jack, no complaints, it's been two years since I, the batteries of my Galaxy Note 2 still hold up for at least two days
