Power bank blowing fuses?

mapj1:


More description needed

Okay... I had previously bought a 'native' two port USB charger plug from E, Leclerc (a supermarket in France) which is plugged into a standard two pin french socket. I've been using this charger plug for a while with a multi connector charging lead which has connections for both the new and old style apple devices as well as a micro usb connector. When I was there last week (to switch on the electrics after switching over to a domestic supply) I needed to charge up my relatively new (been using it for about two months now) 10050 mAh  'bunnycell' powerbank. When I connected the powerbank to the USB charging plug via the micro usb connection on my multi connector charging lead , the lights that indicate that the powerbank is charging were lit but after a minute or so went out... I then noticed that the blue led light on the charging plug was out too (indicating that there was no power to the plug) and thought I'd tripped the mcb. Checked the mcb but it was still on. Checked the charging plug thinking that the light had simply blown but the plug wasn't charging anything (tested by trying to charge my phone). The USB charger plug had ceased to work. So I then dug out a UK charger plug (three pin) and plugged it into an extension cable in the study that has four UK 3 pin sockets but plugged into a two pin wall socket i.e. french to UK conversion so I can plug in my UK computer equipment etc while I'm there. I also used the original charging cable that came with the powerbank. When I plugged the power bank in, the extension lead just stopped working i.e. all monitors went out. There is no fuse to 'blow'  in the french two pin plug on the end of the extension lead and again it didn't trip the mcb for the sockets in the study...


When I got back to the UK, I plugged the power bank in to my usual USB charger plug which sits by my desk at home and its charged up as normal...


I'm interested to know why plugging in the powerbank has broken both the USB charger plug and the extension lead in France when it works just fine in the UK and the powerbank is sold internationally... ! ?

mapj1:


More description needed

Okay... I had previously bought a 'native' two port USB charger plug from E, Leclerc (a supermarket in France) which is plugged into a standard two pin french socket. I've been using this charger plug for a while with a multi connector charging lead which has connections for both the new and old style apple devices as well as a micro usb connector. When I was there last week (to switch on the electrics after switching over to a domestic supply) I needed to charge up my relatively new (been using it for about two months now) 10050 mAh  'bunnycell' powerbank. When I connected the powerbank to the USB charging plug via the micro usb connection on my multi connector charging lead , the lights that indicate that the powerbank is charging were lit but after a minute or so went out... I then noticed that the blue led light on the charging plug was out too (indicating that there was no power to the plug) and thought I'd tripped the mcb. Checked the mcb but it was still on. Checked the charging plug thinking that the light had simply blown but the plug wasn't charging anything (tested by trying to charge my phone). The USB charger plug had ceased to work. So I then dug out a UK charger plug (three pin) and plugged it into an extension cable in the study that has four UK 3 pin sockets but plugged into a two pin wall socket i.e. french to UK conversion so I can plug in my UK computer equipment etc while I'm there. I also used the original charging cable that came with the powerbank. When I plugged the power bank in, the extension lead just stopped working i.e. all monitors went out. There is no fuse to 'blow'  in the french two pin plug on the end of the extension lead and again it didn't trip the mcb for the sockets in the study...


When I got back to the UK, I plugged the power bank in to my usual USB charger plug which sits by my desk at home and its charged up as normal...


I'm interested to know why plugging in the powerbank has broken both the USB charger plug and the extension lead in France when it works just fine in the UK and the powerbank is sold internationally... ! ?