Question: I have lost my charger, can you please help me find a replacement?
Answer: The factory offers a replacement charger under Part Numbers:
1949616A1 - 110 Volt AC Charger
164A076U01 - 220 Volt AC Charger
To save yourself money and time, you can find a replacement at just about any electronics store, or just go down to your local Radio Shack.
The required specs are:
AC Adapter: Class 2 Transformer
Input: 120VAC or 220VAC (whichever you require)
Output: 12VDC @ 300mA
Center Post Tip: Positive (+)
Connector: 5.5mm O.D. x 2.5mm I.D. (Radio Shack Adaptaplug "N")
Photo of ABB 110V Transformer Tag (1949616A1):