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4Sevens battery chargers keep your flashlights operating at full power. Though the lifespan of 4Sevens flashlights is typically pretty long, there will come a time when your flashlight simply runs out of juice. That's when it's time to plug your flashlight in to a 4Sevens battery charger. Just a few hours on one of these battery chargers will be enough to return your flashlight to its brightest. 4Sevens makes sure your flashlights are never without power with 4 Sevens battery chargers.