Keeping the iPhone powered while traveling 
 When I was at home or at work, it was simple enough to plug the iPhone 
in somewhere to quickly top off the battery, but when traveling or 
running around all day, it’s too easy to run the battery down. What do 
you do when the phone doesn’t have a removable battery? 
 Part 1 - Mophie Air case 
http://mophie.com/  This is a 1200mAh battery, built into a case. It adds a bit of bulk to 
the phone, but I have found the advantage of having a charged phone 
all day is worth it.  It is sufficient to keep the phone going all day 
without running the battery down all the way. The battery in the 
Mophie case is enough to charge the iPhone %60 of charge. I turn the 
case battery on when I’ve run the battery down to 40%. 
 The only downside is the cover piece that fits over the volume 
buttons. There is a very thin and narrow piece of plastic which seems 
to be prone to cracking. I read online that this is a very common 
problem. I “fixed” my case by cutting off the broken piece, and then 
gently sanding around the edges to smooth them out. I tried gluing the 
pieces together with some super glue, but the broken bit refused to be 
glued. I was afraid if I left it broken and loose, it might crack the 
piece in a more even inconvenient place. 
 Part 2 - The Just Mobile Gum Pro 4400mAh external battery 
http://www.amazon.com/Macsense-Mobile-Battery-4400mAh-High-Power/dp/B0026NB4UE  This is an external battery that will charge your iPhone 2.4 times. 
I’m not sure how many times it can charge the Mophie Case plus iPhone 
combo, but it is enough to give many more hours of extra use. The 
battery has a mini-USB plug to charge it, and a standard USB plug to 
plug the phone or Mophie case into. The added benefit is that if you 
have any other devices that charge off a USB plug, you can use the 
battery with it as well. 
 Part 3 - Plug Adapters 
I got a China power plug adapter so that I can plug my regular iPhone 
USB charger into the Chinese wall outlets. This adapter is also common 
with the Australian-New Zealand plugs. It looks like a U.S. plug with 
the prongs rotated slightly to form a V. I have been fortunate to find 
that the hotels we’ve been staying at have universal wall outlets. I 
have only needed to use the adapter in one hotel. Some people will 
tell you that you need a voltage converter. You only need a voltage 
converter for devices that aren’t euro-asia friendly and will only run 
on U.S. voltage (110-120v). Many chargers, like the iPhone USB 
charger, is rated for 100-240v, so it can be used with a plug adapter. 
 I also made a modified extension cord, so that I could use more than 
one US device with the adapters.
 
  
  
 
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