I have come across 3 models:
BC-9HE
BC-9HS
BC-7D
What is the difference between 9HE and 9SE as they look the same to me? 7D does not have fold away pins.
Wondering if there are any others and if any particular model is considered the best.
I also came across this DoublePow one:
https://www.ebay.co.uk/itm/154248731747
Wonder if I should get one of those as they are less than half the price of the original Sony ones.