Where to find the Serial Number of a Charge Amps charger?
You can find the serial number on the bottom of the charging station. Small silver coloured sticker.
The serial number usually has 10 digits + the letter at the end
H or M = Halo (see on the label of the Halo, at the lamp at the bottom of the Halo)
A = Aura
G = Amp Guard
For Dawn, it is on the backplate, see the image below