In this part, I can only warn. Although it looks compact, protrudes from the cigarette lighter and sits shaky. Is bad that it once the software of Sony Ericsson K800i has completely paralyzed. After reactivation was the standby time (instead of the previous five nights) only a few hours. Even with a new battery, it was no better. On the package was "for any USB device", and I have charged my phone more often via USB to the computer. Now I hope to reinstall the software that brings, and no hardware injury. Conclusion: This charger is dangerous! For the benefit of the mobile phone, MP3 player etc. rather buy chargers that are certified by the manufacturer!