Graphene technology is, without a doubt, the best mobile battery innovation to emerge in the 21st century. Not only do graphene batteries hold up to 20% more energy than a lithium-ion alternative of the same size, they also generate far less heat while charging. Consumer products packing this next-generation tech are still quite rare, but you can be one of three lucky winners to own a Chargeasap Flash portable power bank crafted with graphene cells. Here's what you need to know.
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