1-2 of 2 Answers
If I understand your question correctly, I used this for our APPLE i-Phone 4S. It connects into the Cell phone directly and into the wall block charger that came with the phone.
Sorry, there was a problem. Please try again later.it seems you are talking about a external charger. These devices are used to charge your smartphones/ tablets. These devices have Lithium Polymer Re-chargable cell. The capacity is what is defined by 3.7V, 4400mAh. Input 5V, 1A means that the source required to charge these should be 5V with the ability to accept 1A of current. So, you should be able to charge these devices with practically any smartphone charger. Output 5V, 2.1A means the device can deliver 5V and a maximum output current of 2.1A. basically charging any smartphone or tablet.
I would recommend:
Sorry, there was a problem. Please try again later.

