Rechargeable, battery or plug-in night light: which is best?
It is 2am, you are halfway along a dark landing, and the right night light depends on exactly where you are standing.
Where the light goes decides the power type, far more than the cost of electricity. A plug-in night light suits a fixed spot that should glow all night, every night, such as the landing or the route to the bathroom. A rechargeable night light suits a light that moves: from the feeding chair to the changing mat, into a child’s hands, into an overnight bag. A light on disposable batteries earns its place in a spot with no socket that you only light now and then, like a cupboard.
We do not currently sell a plug-in night light: all 14 of our night lights and bedside lamps are rechargeable by USB. Where a plug-in is the better tool, we say so.
Which power type suits which spot?
Ask two questions: does the light stay on all night, and does it move?
| Spot | Best fit | Why |
|---|---|---|
| Night feeds in the nursery | Rechargeable | Moves from chair to changing mat |
| A child’s bedside | Rechargeable | No cable by the bed once charged |
| A child who carries the light | Rechargeable | Cordless from room to room |
| Landing or hallway, lit all night | Plug-in | Always on, nothing to charge |
| Night-time bathroom trip | Plug-in, or a rechargeable motion light | A steady route light, or light only when someone moves |
| Cupboard or wardrobe | Battery or rechargeable motion light | No socket; used now and then |
| Travel and sleepovers | Rechargeable | Cordless; charge it before you go |
| Power cut | Rechargeable or battery | A plug-in goes out with the power |
Two splits in that table are easy to miss. The first is between your light and your child’s. A light for night feeds has to follow you from the chair to the changing mat and back; our guide to dream feeds and night checks covers where to put it. NestiFox, one of ours, fits that job: the listing says approximately 16 hours on the higher setting and up to 56 hours on the lowest.
A child’s bedside light depends on where the socket is. If the only socket sits just above the headboard, a plug-in puts the plug beside the pillow. A rechargeable light, charged in another room, keeps the cable out of the bed area, which is what our listings ask: keep the USB charging cable and power source away from the sleeping area.
The second split is between always-on and on-demand. A landing lit all night is plug-in territory. A landing lit only when someone walks past can take a motion light instead. StepLume, ours, is a rechargeable wall light with a motion sensor; the listing says it switches off after approximately 15 seconds and sits on a magnetic, tool-free mount. Like any rechargeable light, it still asks for a charging routine. Our guide to auto-on night lights explains motion versus dusk-to-dawn sensors, and adults choosing for themselves will find more in night lights for adults.
What each type asks of you
A plug-in asks for a socket in the right place, a battery light asks for fresh cells, and a rechargeable asks for someone to remember to charge it.
| Plug-in | Battery | Rechargeable | |
|---|---|---|---|
| What you maintain | Regular plug and socket checks | Replacing cells | Charging |
| Where it can go | Next to a socket | Anywhere | Anywhere, once charged |
| Cable in the room | None beyond the socket | None | Only while charging |
| In a power cut | Goes out | Keeps working | Works while the charge lasts |
| When it is finished | Electrical recycling | Cells to a battery drop-off, the light to electrical recycling | Electrical recycling |
If you choose a plug-in, Electrical Safety First’s checks are short: UK 3-pin plug pins, a position that does not create a trip hazard, nowhere damp, and a regular look at the plug and socket for burn marks or arcing sounds.
Does a plug-in night light use much electricity?
No. An LED plug-in left on for 12 hours a night costs about 58p to £2.31 a year at the current price cap.
Electrical Safety First says LED night lights generally use 0.5 to 2 watts, and older incandescent ones 4 to 7. The price cap unit rate is the average price of one unit of electricity (one kilowatt-hour, or 1,000 watts for an hour) under the Ofgem price cap: 26.32p per kWh from 1 October 2026, for a household paying by Direct Debit, averaged across England, Scotland and Wales. Regional rates differ.
Our calculation: 12 hours a night, 365 nights, at 26.32p per kWh
| Night light | Per year | Per night |
|---|---|---|
| 0.5W LED | about 58p | about 0.16p |
| 1W LED | about £1.15 | about 0.32p |
| 2W LED | about £2.31 | about 0.63p |
| 7W incandescent | about £8.07 | about 2.2p |
Charging a rechargeable costs a fraction of a penny too. Where our listings give both a charging input and a charge time, multiplying the two as an upper bound puts a full charge at between about 0.1p and just under 0.5p. CapiZen, for example, is listed at 5V and 0.5A for about 2 hours: 5 watt-hours, or about 0.13p a charge.
We have not put a figure on disposable batteries, because we found no reliable current source for cell prices. Their cost is the cells, not the electricity.
So running cost should not decide this. The spot, the cable and whether anyone will remember to charge it should.
How long does a rechargeable night light last on a charge?
Only as long as its listing says, and less on brighter settings. Every runtime on our own listings is an estimate, worded "approximately" or "up to". The most useful figure is runtime per brightness level: separate hours for the brightest and the dimmest setting. Our guide to lux and lumens explains what those settings mean.
Here is how our listings compare with a 12-hour night, taking 7pm to 7am as the example.
| Our light | Runtime the listing gives | Listed maximum covers 12 hours? |
|---|---|---|
| GlowRoam | Up to approx. 22.5h, depending on brightness | Yes |
| CapiZen | Up to approx. 16h bright, 56h low | Yes, on either setting |
| NestiFox | Approx. 16h higher, up to 56h lowest | Yes, on either setting |
| Anseria | Up to 10h, depending on brightness and use | No |
| Elephia | Approx. 5h high, up to 10h low | No |
| Whalumi | Approx. 6 to 8h | No |
Battery size alone will not predict runtime. Capacity is listed in mAh (milliamp-hours, in effect the battery’s size), and two of our lights list 1200mAh: CapiZen gives up to approximately 16 hours on its brighter setting, Anseria up to 10 hours.
The plain reading: three of ours list enough for a full 12-hour night. CapiZen and NestiFox both list up to 56 hours on their lowest setting, which on the listed figures covers several 12-hour nights on one charge. The rest suit stories, feeds and night-time checks, and some add a timer (Elephia’s is 30 minutes). If you want light all night, every night, in one fixed place, a plug-in is the better tool.
For an adult who wants a longer run, or a light to pack for a trip, GlowRoam lists the longest runtime in our range, in warm or cool white.
Can you leave a rechargeable night light plugged in?
Charge it, then unplug it. Electrical Safety First’s advice on USB chargers is to unplug a device after charging, keep it uncovered and ventilated while it charges, and not to use USB chargers overnight or while you are out. London Fire Brigade’s charging tips for everyday devices agree: do not leave items on charge after the cycle is complete, never cover chargers, and if a battery swells, stop charging and contact the manufacturer.
Charge in the daytime, uncovered, somewhere you can see it.
Ours run cordless once charged: charge in the day, unplug, and use the light at night. Have a USB wall plug ready; a spare phone charger plug usually does the job.
Our bedside listings also say to place the light on a stable surface outside the cot or bed. The Lullaby Trust’s clear cot guidance says a baby’s cot needs only a firm, flat mattress and lightweight bedding, so the light and its cable never go in the cot.
When a battery night light makes sense
In a spot with no socket that you light now and then: a cupboard, a wardrobe, a stretch of wall with no plug nearby.
If you buy one elsewhere, check which batteries it takes. The Child Accident Prevention Trust warns that button and coin batteries can badly hurt a small child if swallowed, lists lights among the places they turn up, and advises checking for loose battery backs; if one is swallowed, go straight to A&E. Ours are rechargeable by USB, with no cells to replace. Our toddler night light guide covers the fuller checks.
Spent cells and dead rechargeable lights share one rule: never bin batteries or electricals. Recycle Your Electricals notes that hidden batteries can cause fires in bin lorries. Shops that sell a lot of batteries must take old ones back free of charge, and electrical recycling points take the light itself.
What a listing should tell you before you buy
Six things. If one is missing, ask the seller before you order.
- Power type: plug-in, battery or rechargeable.
- Battery size in mAh.
- Runtime at each brightness level, not one headline figure.
- Charge time and charging input, such as 5V / 0.5A.
- Whether it works while charging.
- What is in the box: a cable, a plug, or neither.
The same six questions work on any listing, ours included.
CapiZen is a good example: the listing gives the battery size (1200mAh), runtime at both settings, a two-hour charge at 5V / 0.5A, and a USB cable in the box.
You may well end up with more than one type: a plug-in on the landing, a rechargeable by the bed. If a rechargeable suits your spot, our night lights are all in one place, and our guide to warm white versus cool white helps with the colour.
References
- Ofgem. Energy price cap unit rates and standing charges. Rates from 1 October to 31 December 2026. Accessed 28 September 2026.
- Electrical Safety First. Night lights. Accessed 28 September 2026.
- Electrical Safety First. USB chargers. Accessed 28 September 2026.
- London Fire Brigade. Batteries and chargers. Accessed 28 September 2026.
- Child Accident Prevention Trust. Button battery safety. Accessed 28 September 2026.
- Recycle Your Electricals (Material Focus). Retailer take-back. Accessed 28 September 2026.
- The Lullaby Trust. Keeping a clear cot. Accessed 28 September 2026.
- GOV.UK. Battery waste: supplier responsibilities. Accessed 28 September 2026.