I just got this brilliant charger yesterday I did a quick test yesterday for 45min and in that time I did a quick test on my sony xperia z1 and my RAVPOWER the 16000mAh External Battery Deluxe as plugged (blocked) in the fast port 2.4 my sony loaded up about 60% that my external battery 25% today I tested them properly in 2.4 ports I handed the external battery in my iPad and that was down to 70% and then z1 in my slowest imputation 1.0 port for testing. In a roughly 1h30mins my phone fully charged iPad was full. And the external battery 50%. The battery takes some time to fully charge it. I do not let the habit during the night so no idea how long it takes normally connected. I found this very rapid charging, I couldnt test my speaker (speaker) Blue tooth as fully charged (loaded). RAVPower 16000mAh 3rd General Deluxe External Battery is a fantastic device also and has already reviewed it, my phone never loses load now when im with and so you feel sure you will find your dead phone.
