With 3 batteries, I can ride, morning after morning and evening / night. Convenient as compact, to take him on my trip. I use power supply unit Asus Nexus 7 (2A), the original block bad contact (1A).
Silicone house that I use for my S3, s "removes very easily. I have not planned to use it as support.
Finito, the expectation that battery charging with S3 operation soon reach 100%.