battery backup

If you don’t already have a battery backup unit for you cell phone and other USB powered electronics, then take at a look at something like the  Anker Astro E4 13000mAh External Battery for just under thirty bucks.  I started out with a smaller portable battery pack, but have been nothing but happy since upgrading to a 13000mAh unit. That’s the trick behind these, if you aren’t already aware. The mAh number is the amount of juice that can be stored inside the box. So if your phone has a 2500mAh battery, then you could expect somewhere around five recharges out of the Astro E4’s 13000mAh battery. I’ve used one as my sole phone charger for a week in the woods without a problem.

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