I have recently bought an external battery pack for carrying on motorcycle camping trips as well as for travelling
Its fairly heavy but powerful enough to power my CPAP machine for 2 nights without recharging. It also can also be used to power a laptop and to recharge smartphones tablets etc.

I am also planning on using it to power or recharge all my travel electronics, however I would like to find a better power supply for recharging. It uses a 20V 2.1A supply but the supplied pack has a UK plug built in (I am in the UK). I would like to find a better power supply which can easily be used for recharging the external battery at home in the UK and also when travelling in Mainland Europe, the USA and Australia.

I would prefer not to use a separate adapter plug as I find these have a habit of falling out of loose sockets.

Can any one recommend a lightweight universal good quality power supply which I can use with the power-bank?

You'd need to measure the DC plug to know what you can replace it with. There are plenty of 20V DC chargers on Amazon, but you won't be able to pick one until you know the plug dimensions.

Yes indeed I know that info and it not a problem, the real problem is the AC end as I want something able to deal with multiple countries and I don't want to carry a bunch of international AC adapters. I have spent hours on Amazon and found nothing that fits the bill.

Looking for something with a detachable line cord so that you carry only the cord you need for the specific trip?

Thanks Mia, great Idea and i have just ordered something similar.