Keeping Your Phone and Internet Alive Through a Blackout

A dead phone during a blackout isn't just an inconvenience — it's the loss of your torch, your radio, your map and often your only line to emergency services or family, all at once. Keeping it alive isn't about a single gadget; it's a small set of habits that add up to hours or days of extra runtime from the same battery.

Screens, background apps, constant signal-searching and location services all drain battery even when you're barely using the phone. In a blackout, phone masts often run on backup power for a limited window before they fail too, which means your phone burns extra battery repeatedly searching for a weak or absent signal — exactly the moment you most need it to last.

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   Turn on low power mode and drop screen brightness immediately. This single step often roughly doubles remaining runtime with no loss of core function.

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   Switch to aeroplane mode and check messages periodically rather than staying connected. Turning mobile data back on for two minutes every hour uses a fraction of the battery that staying connected and constantly searching for signal does.

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   Close background apps and turn off notifications you don't need. Anything that pings, syncs or updates in the background is spending battery on tasks that don't matter right now.

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   Stop using the phone as your primary torch. A £5 headlamp or wind-up torch does that job without touching phone battery at all — see the first hour of a blackout for why this matters early on.

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   Charge from a powerbank before the phone hits zero, not after. Charging from empty is slower and slightly less efficient than topping up from 30-40 percent; little and often beats one long charge.

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   Bring in solar or a car charger for anything beyond a day or two. A small panel left in a window, or ten minutes of engine idling with a car charger, can recharge a powerbank when mains power is out for longer stretches — see sizing solar and battery setups if you want a proper setup rather than a stopgap.

Capacity matters less than most marketing suggests once you're past a basic threshold — a powerbank in the region of 10,000-20,000mAh will typically refill a phone several times over. What matters more is that it's actually charged before the outage starts, and that it's stored somewhere its own battery won't degrade quickly; see powerbanks that survive the cold if you're storing one anywhere unheated.

If you're expecting a call — from family, from utility updates, from emergency services — keep it on but in aeroplane mode with periodic checks. If you genuinely don't need it for hours, turning it off entirely uses less battery than any low-power mode, though you lose the ability to receive calls in that window. Decide which trade-off matters more before you need to.

• Leaving mobile data or wifi searching constantly for a weak signal
• Using the screen as a torch at full brightness
• Charging other people's phones from your only powerbank before your own needs are covered
• Forgetting the powerbank itself needs charging as a habit, not a one-off purchase

Will putting the phone in the fridge or freezer help save battery? No — this is a myth and can cause condensation damage. Cold does slow battery drain slightly at rest, but the risk to the phone outweighs any benefit; a low power mode achieves more safely.

Is it worth buying a solar charger just for phones? Only if outages are common where you live or you're planning for emergency comms when networks fail more broadly — for an occasional short outage, a couple of charged powerbanks usually cover it more cheaply.

• Ready.gov, power outages (https://www.ready.gov/)