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How to Build portable USB battery packs

"How to Build portable USB battery packs" cover image

Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast.

Search Systm on WonderHowTo for more DIY episodes from this Revision3 show.

In this episode of Systm, you can find out how to build three USB battery power supplies so you never run out of power for your favorite gadgets!

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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