Considering how attached we all are to our technology, a dead phone can cause anyone to start panicking. As for charge time, it generally takes around three hours for the average smart phone (iPhone, Galaxy, etc) to charge up. For those of us who don't have three hours to sit by our phones before a full charge, there are a couple alternatives: let it die, buy an external battery pack and now, Legion Meter.
Legion Meter is a curious device. It looks like a USB drive and plugs right into your existing charger. It has a tiny OLED display, which allows you to set preferences. And it has ability to charge your beloved technology 92% faster--that's a lot less time sitting by your phone waiting for it to charge.
So, first things first, is it going to deep fry your phone battery? No. It's completely safe to use. We promise. When you plug Legion into your charger (it plugs into your USB end of your charging cord), you select the mode of operation. There's an Apple mode and Android mode (BlackBerry, Windows, Nokia and GoPro users should select Android mode.) The mode determines how Legion will speed up charging, optimizing the experience for your device and signaling the device as to what is a safe amount of charge. Basically, it tells your phone exactly how fast it can charge without hurting itself. This process is part of the PLX Charge Accelerator Circuit, which Legion Meter is patenting.
The actual speed is determined by Legion's intelligent algorithms, which "learn how you're using your devices and calculates your energy usage at roughly 500 times/second giving you ultra accurate power metering." Remember that little display screen? All of that information shows up right there. It'll help you diagnose how healthy and happy your battery is (or isn't.)
Based on their Kickstarter, Legion Meter starts at $39 (free shipping in the US and $5 to Canada.) That's about the same as some external battery packs, but around $50 less than battery pack cases (and way easier to carry.)