Euro transformer to uk converter plug battery charger adaptor rvfm bca bk 3a this adaptor plug converts a plug in transformer power supply or battery charger with european plug pins into a bs1363 transformer power supply suitable for use in the uk the adaptor gives safe and reliable connection while saving time and effort on assembly simply slide the europlug into position and tighten the screw to clamp the euro plug in position rvfm bca bk 3a power connections battery charger adaptor