Hello guys, Need help in choosing which charger is the better one. At the moment, I'm currently thinking of getting either 1. Anker Astro2 8400mAH, or 2. TeckNet iEP387 7000mAH Any suggestion which one I should buy, or is there any other good brands or charger out there to use. I'm currently using the Nexus (soon upgrading to S3) and the iPhone 4s, and I frequently travel (it's annoying to always find a place to charge the phone). Since both has two USB ports, it is a great choice, but the bulkiness of the Anker really makes the TeckNet the better one. Help me in choosing which one is better, I'm having a dilemma here >.< Thanks for the advice!