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I’ve always said I wouldn’t mind a little extra bulk in my pocket if it means some more battery life, but this might be taking it a bit far. The Ulefone Power Armor 13 has the biggest battery I’ve ever seen in a phone, let alone a rugged one—and the biggest screen, too. It’s the ultimate rugged toolbox device that can even become an emergency battery pack for your other smartphones. But you’re almost certainly going to need new trousers.