You can tell at first glance that the Energy XL, an unlocked Android phone from Blu, is going to live up those two letters at the end of its name. This $299 smartphone features a giant, curved screen that’s even larger than most plus-sized flagships. But Blu’s phone lives up to its name in other ways, with a massive battery that keeps the phone powered up from dawn until long past dusk. You won’t find impressive cameras or a blazing processor in the Blu Energy XL, but you will get a phone that lasts a long, long time.