A couple of questions.. 1. In the car I've got a 2.1A/1A dual USB charger. Will it hurt an iPhone 5 to charge in the 2.1A port? 2. Are there any substitutes that anyone has had good experience with for the Apple 5W wall charger and/or lightning cable for iPhone 5? I need a few extra charging setups for around the home, at work, etc. and can't see spending $40 ($20 for 5W single USB wall charger and $20 for lightning cable) for each setup. Thanks!