1.Regarding charging and operation of the E11K/A3
A: The E11K/A3 utilizes the typical Micro USB port for charging and can operate even while charging. The blue LED will pulsate while charging and light steadily when fully charged. Charging takes roughly 4 hours and may be carried out by any USB power adapter of 5V and ≥500mA current capacity. The E11K may operate continuously for about 16 hours on a full charge. If the E11K won't turn on, please try charging it first; if it still doesn't work, please contact FiiO for service!