One consideration is that some dodgy forrin sockets are oddly placed and insecure, so any charger (including the ultra small lightweight that rr posted, which can also have unwanted incendiary chinesium characteristics) may drop out, making an external charger with replaceable mains cable my favourite option. If I was looking now, I think I'd prefer to find a small GaN charger with a replaceable mains plug that slides onto the contacts. Not sure who do one like that, tbh, Anker don't seem to, which is a shame.