
Adrian Kingsley-Hughes is an internationally published technology author who has devoted over two decades to helping users get the most from technology -- whether that be by learning to program, building a PC from a pile of parts, or helping them get the most from their new MP3 player or digital camera. Adrian has authored/co-authored technical books on a variety of topics, ranging from programming to building and maintaining PCs.
Full BioPower banks come in all shapes and sizes, but the Nitecore 21700 intelligent battery system is one of the smallest, most bare-bones I've used.
It's basically a super-powerful rechargeable battery, a charger/power bank adapter, and a lantern attachment.
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Let's take a look at the three main components (the case is, at the end of the day, just a nice plastic case), starting with the battery.
The cell at the heart of this is a Nitecore NL2150HPi 5000mAh/3.6V/18Wh 21700 rechargeable cell. This battery can put out 15A continuous discharge and features a number of built-in protections.
The cell is also interesting in that it has positive and negative terminals at both ends.
It's a beast of a cell.
Then there's the MPB21 magnetic power bank adapter. This clicks onto the top of the battery and features a USB-A port for output and a microUSB for charging, both compatible with 5V/2A.
There's also an ML21 magnetic lantern attachment. This offers 80 lumens of >90 high CRI soft light and can run for 19 hours.
And that's it. The package retails for under $40 and is a great minimalist power package.
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