Plugs voltage power banks and the power cut question for keeping devices alive

Electrician and I sell adapters daily so the complete electrical briefing Plug and voltage Sri Lanka runs 230 volts at 50 hertz and the dominant socket is the Type D the large round three pin (the old British and Indian style) with Type G the UK rectangular three pin also common in newer hotels Type M the larger round three pin appears too Your European Type C two pin chargers need a physical adapter and the cheap universal adapter sold at any hardware shop or the airport handles all of this Converter question almost certainly NOT needed modern phone laptop and camera chargers are universal voltage input (check the small print it will say 100 to 240 volts) so they only need the plug adapter not a voltage converter only old single voltage appliances like some hair dryers need a converter and those you simply leave home Power banks the aviation rule lithium power banks travel in CARRY ON only never checked baggage this is airline safety law everywhere not local capacity limits apply to very large banks check your airline a normal phone sized bank is fine carry on Power cuts the honest current state the severe scheduled blackout periods of recent years have eased but unscheduled cuts still happen especially in monsoon storms and in remote areas the grid is older Stability the hills and remote beaches see more flicker and brief outages than Colombo The practical defence carry one power bank charge everything overnight when power is on and choose this is the real tip guesthouses and hotels that mention a backup generator in monsoon season the storm cuts are when you want it A surge protector for a laptop is not paranoid in the remote hill country the voltage wobble is real