Double A USB charger/recharger

[roadpacker]

I want a bigger battery pack on my touring bike. Does anyone know of any battery packs that will support 4 AA's, and also have female USB port for charging other devices, but also accept a USB-IN for charging off rechargable AA's off my dynamo port?

Thanks!

[dh024]

Goal Zero make some great portable power products. This one looks like just the thing to suit your need:

http://www.goalzero.com/p/133/guide-10-plus-recharger

http://www.amazon.com/Goal-Zero-11401-Guide-Batteries/dp/B004NCY1G0

[roadpacker]

I wonder if there isn't a way to up-mod the minty-boost with extra batteries (4 v. 2) and also the ability to be charged by a USB-in.

[LiiT]

http://www.adafruit.com/category/44

all kinds of neat lil things

perhaps this is what you seek

PowerBoost 500 Charger - Rechargeable 5V Lipo USB Boost @ 500mA+
PRODUCT ID: 1944
PowerBoost 500C is the perfect power supply for your portable project! With a built-in battery charger circuit, you'll be able to keep your project running even while recharging the battery! This little DC/DC boost converter module can be powered by any 3.7V LiIon/LiPoly battery, and convert the battery output to 5.2V DC for running your 5V projects. Like our popular 5V 1A USB wall adapter, we tweaked the output to be 5.2V instead of a...