Mine arrived yesterday from a UK ebay seller. Plugged the battery to light and it worked fine. Plugged the charger into the wall socket-green led lit up, plugged battery pack in-nothing happened for half a min then the bloody thing literally exploded! Didnt half go with a bang.
Looks to be the same battery pack and charger as the early/original magicshine light and which have been faultless battery/charger wise.
Have contacted 'UK' based seller.
Mines probably a one off but just be aware and don't leave them unattended or put them on an extension cable and in a metal box to charge!