How to Make a Homemade Rechargeable 15000mAH Power Bank

If you’re devices never seem to have enough juice to make it through the day, a portable charging bank like this one from Amazon.com can help, but if you’d rather build your own and aren’t afraid of a soldering iron, here’s how to make a homemade 15000mAH USB charger.

If that looks like more than you’d like to tackle. Amazon does have a one-day only sale going on the Lumina 15,000 mAH ultra compact portable charger ($27.19)

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