How Long Will It Run

A power cut kit for elderly parents

Older people are the ones most at risk when the power goes: falls in the dark, cold houses, and a home phone that no longer works without mains power. Most of the answer is cheap and can be set up in one visit. This page is for the relative doing the setting up.

In the US? See the US edition.

Know this first

The phone problem

Landlines are moving to digital by January 2027. A digital home phone runs through the broadband router, so in a power cut it stops unless there is battery backup. Providers must offer a free solution giving at least an hour of emergency calls to people who depend on their landline: ask for it. More in will your phone and internet work in a power cut.

Telecare alarms

A pendant or careline alarm has its own backup battery, but if it calls out through the router it can stay powered and still reach nobody. The government's advice is to tell your telecom provider that a telecare device is in use, and to check with the alarm provider how it behaves in a power cut.

The Priority Services Register

Anyone over state pension age can join the free Priority Services Register. The network operator then contacts them in a power cut, and can prioritise help. Sign up through their supplier or by calling 105. See the medical equipment page if they use any.

Light without looking for it

Set these up on the visit; they need nothing doing when the power goes.

Plug-in power failure lights

They live in a socket as a night light, charge themselves, and switch on the moment the mains goes off, so you are never hunting for a torch in the dark.

Look for: A built-in battery you can pull out and carry as a torch, and a UK three-pin plug if you are in the UK.

Battery motion-sensor lights

Stick-on lights on the stairs and landing come on when someone walks past, so nobody climbs stairs in the dark, which is when older people fall.

Look for: Rechargeable or AA batteries, and a warm white setting that is not too bright at night.

LED lantern

Lights a whole room for an evening where a torch lights one spot.

Look for: A stated runtime on its low setting and a battery type you already keep in the house.

A phone that still works

The router is the weak point.

Simple mobile phone

A basic mobile with a week of standby is the backup when the home phone dies with the router. Easy to use, and it stays charged far longer than a smartphone.

Look for: Large buttons, a loud ringer, a long stated standby time, and an emergency button if it will be used by someone who lives alone.

Mini UPS for the router

Home phones now run through the broadband router, so when it goes off in a power cut the landline goes with it. A small battery box keeps the router, and the phone plugged into it, working.

Look for: DC outputs that match the voltage printed on your router's power adapter (usually 12 V), enough of them for the fibre box too if you have one, and a capacity in watt-hours.

Power bank, 20,000 mAh

Keeps a phone going for days if you use it sparingly.

Look for: Capacity in watt-hours as well as mAh (about 74 Wh for 20,000 mAh), USB-C in and out, and keep it charged.

Warmth

Warm the person, not the room.

Thermal base layers

Warm layers next to the skin keep a person warm in a cold house for far less than any heater, and cost nothing to run.

Look for: Long sleeves and long legs, sized loose enough to wear under ordinary clothes.

Hot water bottle and a vacuum flask

Boil water while you still can, keep it hot in a flask, and refill the bottle through the night.

Look for: A bottle made to BS 1970 in the UK, and a flask of a litre or more.

Vacuum flask

Filled from the kettle before the storm, it gives hot drinks and hot water bottles for most of a day without power.

Look for: A litre or more, stainless steel, and a stated heat retention in hours.

Fleece blankets or sleeping bags

Layers and a warm bed do more than any heater a battery can run.

Look for: Whatever you would take camping; a sleeping bag rated for the season is warmer than a duvet.

News and safety

Something to listen to, and a working alarm.

Battery or wind-up radio

Local radio carries outage and weather updates without using your phone battery.

Look for: DAB and FM in the UK; a NOAA weather band in the US. A hand crank or solar panel is a bonus, not a substitute for batteries.

Battery carbon monoxide alarm

Anything burning fuel indoors, a boiler relit after an outage included, can produce carbon monoxide you cannot see or smell.

Look for: A sealed long-life battery and EN 50291 certification in the UK (UL 2034 in the US).

What a power station keeps running

The kit above keeps people comfortable. A portable power station keeps things running. This is what a 1,056 Wh Anker SOLIX C1000 manages for each load on its own, from full.

LoadAlone, from full
Wi-Fi router36 h 33 min
Electric blanket23 h 59 min
Phone charging2 days 13 h
LED camping lights2 days 21 h
TV, 32 inch LED13 h 42 min

A power station is worth considering for someone who uses an electric blanket or depends on the router for a telecare alarm, and is simpler to use than a generator. Its display shows the charge left. Compare stations in the buying guide.

Checklist to print

  • Power failure lights in the hall, landing, bedroom and bathroom
  • Motion lights on the stairs
  • On the Priority Services Register
  • Phone provider told about any telecare alarm; battery backup for the router asked for
  • A simple mobile, charged, with your number on speed dial
  • Radio with fresh batteries
  • Thermals, hot water bottle and a flask
  • Carbon monoxide alarm, tested
  • 105 and your number written by the phone

On your next visit

  1. Plug in the power failure lights and stick up the motion lights, and show them the lights come on by themselves.
  2. Sign them up to the Priority Services Register through their energy supplier.
  3. Call their phone provider about the digital switchover, any telecare alarm, and a battery backup.
  4. Write 105 and your number on a card by the phone and in their purse or wallet.
  5. Agree who calls whom when the power goes.

Sources

Amazon links on this page are affiliate links; the site may earn a commission at no extra cost to you. They are searches for a type of product, not endorsements of a particular model, and nothing here has been tested hands-on. Prices and stock change constantly.