Alkaline batteries
this is a eco-friendly batteries. Is a new object in the market; You can use this batteries for charger differents devices or use for USB port.
USB ports have been used as a power source for a coffee mug-warmer and USB is rechargeable for a new use.
You can help the environment if you buy this product, because the USB-batteries can be re-used.
Other thing that make a difference is you can save this baterries in a small space.
USB cell is a new innovation, with a environment material, It have aluminum, recycled plastic, to help the environment and have a contribution with the green zones.