Originally Posted by
No_Name
Based on a tip from the forum, I've been using the UK adapter routinely on flights because the plug doesn't fall out.
The problem with the flat US-style plug is not just that wear-and-tear have made them loose, but two different blade lengths. From what I understand, the usb plugs are made with the shorter blade length (for compatibility) and the receptacles on the plane are designed to accept the longer blade length. Thus the receptacle does not hold the plug as well.
I bought one of those in a Wilko store in the UK for 6.0 GBP. It works great.
I also bought a two prong European USB charger that can charge two devices at once and also works great (I got this one in a cell phone store in Florence for 9.00 Euros).