inputs.text: low power 500ma usb charge - lack sophistication reviews surprising perhaps recently smartphones monster screens drawing 500 charge became available reason lack awareness nutshell charger not data lines usb jack shorted together therefore phone determines capable 500 charge current connected computer usb port see indication android phone settingsabout phonestatus charger indicates phone capable high current ac charging shorting data lines phone reads responds drawing enough current charge reasonable rate seen no mention extremely common problem anywhere amazon