I stumbled upon this in the Hacker website:
Produktrückruf für / Safety Recall for Thunder Power Charger TP610C-ACDC Part# 29763804 » Hacker Motor GmbH - Ergolding/Landshut - Germany
and the tonisport site:
ToniSport - The World Champion RC Equipment
It is dated 2014/04/04 in the Hacker site.
There is insufficient isolation between the primary and secondary windings in the internal power transformer of the unit.
I don't know if this applies to US units with 110v input.
Produktrückruf für / Safety Recall for Thunder Power Charger TP610C-ACDC Part# 29763804 » Hacker Motor GmbH - Ergolding/Landshut - Germany
and the tonisport site:
ToniSport - The World Champion RC Equipment
It is dated 2014/04/04 in the Hacker site.
There is insufficient isolation between the primary and secondary windings in the internal power transformer of the unit.
I don't know if this applies to US units with 110v input.