Although they say they are made for Apple iPhone/iPod/iPad, these cute little apple chargers from apel pi actually work for any USB-chargeable smartphone or tablet. The OPSO chargers have USB-chargeable Lithium-ion batteries. They have four LEDs to indicate charge level for the internal battery. Although they don’t tell us how it works, they also have “an intelligent apple stem to ensure you know when the OPSO needs charging.” There are two models, the OPSO Slim and OPSO Plus. Both models are available in white, pink, or green. The OPSO Slim has a 3200mAh battery that charges most smartphones; it’s $49.99. The OPSO Plus has a 6400mAh battery that charges most smartphones and tablets. (You can see the supported lists on the Slim and Plus web pages.) The OPSO Plus is $59.99.