Hi All; just plugged in my ego 1100mah battery into supplied usb charger and all that happens is the red light on charger blinks off and on, while the button on the ego battery remains blue? Is this charging, been like that 10 minutes now, or is battery or charger faulty??? Thanks...I have noticed that a lot of these usb chargers that came with my ego battery kits ( I have quite a few) are often complete duds..