$3 DIY Emergency USB Phone Charger From An Altoids Tin
Need a quick backup battery for your phone?
You can make one of these backup phone chargers from just a 9V battery and the guts of a dollar store car charger.
I found this video particularly clever because it’s not obvious that to charge a 5V device, one might take a part a 12v charger and substitute a 9V battery — but it’s the the dollar store electronics that do the voltage matching. Very nice.
Watch The Video And Leave An Awesome Comment Below
I found a backup phone charger to be an essential item when I’m out on a day-long hike — which has been known to happen to me whether I planned it to be a “day long” hike, or simply a quick morning walk!
Fortunately, this type of hack isn’t as necessary as it was a year ago when I posted this, because there are finally lots of rechargeable phone booster batteries available for reasonably cheap. I have one of these, and I love it!