USB Cell AA Batteries with a USB connector right inside the battery for super easy recharging. Proporta USB Mobile Device Charger Portable battery pack that can recharge your mobile devices (iPod, Cell Phone, Digital Camera, etc) on the go. Charges with USB and comes with a ton of different adapters for different devices. One charge can recharge multiple devices. Battery University How to prolong the life of your lithium-based batteries Battery Xtender Recharge your non-rechargeable "alkaline" batteries.
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