I'm traveling from the US to the UK in a few weeks. Can I recharge a power bank purchased in the US at a UK power outlet? The specs for all the power banks I've been considering make no explicit mention of dual voltage.
Examples:
Anker PowerCore 10000
Anker PowerCore 13000
RAVPower Portable Charger 26800
(I know I can recharge it from my laptop, but the wall outlet is probably faster.)