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This Ni-MH battery can be recharged approximately 2,100 times and still retain 70% of its original energy in ten years’ time. Promoting the shift from dry cell to rechargeable batteries, it will help to create a sustainable society. The sea-themed bluish tone of the battery evokes an image of sustainability. The package concept is a sea glass. The different colors help users keep track of which are charged or uncharged. All batteries are charged with solar energy before shipment. Users can enjoy charging their batteries again and again.