UPDATE: I’m no longer selling these. After looking around, I found several commercially available battery chargers with longer lasting Li-ion batteries and a lower price (Like this one or this one). While I definitely recommend the Mintyboost for a hobbyist looking to learn about soldering and electronics, if you’re just looking to buy a preassembled one, you’re probably better off just grabbing one of these.
I just picked up the awesome Minty Boost kit from Ladyada. It’s an emergency USB charger that runs off two AA batteries and fits inside an Altoids tin. You can charge almost anything that charges via USB, like iPhones, iPods, Android Phones, Kindle, PSP, and more. Here’s a list of devices it has been tested to work with (link).
I bought this kit after my Android phone died one too many times while I was out and didn’t have access to a charger. This is great because you can just throw it in your purse and have emergency power whenever you need it. It can use rechargeable batteries, and charges my Android phone to 80% power with one set of batteries. Not bad!
I’m working on coming up with a better case for it, because the Altoids tin seems a little clunky to me. There are so many cool things you could do with a gadget like this!
Anyways, while I was browsing the forums over at Ladyada, I saw that a lot of people wanted a Minty Boost but didn’t want to solder it up themselves, so I thought I’d offer my soldering services. Once I engineer the perfect case I’ll probably set up a store on Etsy, but for the time being if you just want a standard Minty Boost kit preassembled, send me an email at firstname.lastname@example.org, or leave a comment below.