This USB smart battery charger comes securely ans sensibly packaged.
I cannot yet comment on performance as I have not yet used it and will update as soon as I have charged my first batteries.
All in all it appears to be working, is portable and has room for 4 AA or AAA batteries.
Score will be updated once performance has been tested.
https://www.amazon.co.uk/DLYFULL-Battery-Charger-U4-Batteries-black/dp/B0753F2MWZ