My Cygolite Expilion came with a wall adapter that says it puts out 0.18A Max @ 5 volts. I have a charger from my old Motorola Razr phone ca. 2005, and it says 5V 550mA, or 0.55 A. Is there any problem using that charger with my Cygolite Expilion or Hotshot? I would assume it would charge a little faster with .55 amps than it would with 0.18 amps, no?