1 / 7KVOIDX 3-Fan Cordless Radiator Booster
KVOIDX’s radiator fan booster has three fans, magnetic fixing and a rechargeable 5200mAh battery. Its listing claims 6 to 16 hours of cordless operation, three speed settings and noise below 25dB, but these are manufacturer claims rather than independently verified performance.
At a glance
- Three fans are intended to circulate warm air from a radiator into the room.
- Rechargeable battery allows placement without a nearby power outlet, according to the listing.
- Magnetic attachment is described as tool-free and detachable for moving between radiators.
- Three speed settings let users adjust airflow intensity.
Reference price: £49.99
Price checked: 13 Nov 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Cordless operation can make placement more flexible where a suitable radiator is away from a power outlet.
- Three fan speeds offer a choice of airflow intensity.
- Magnetic fixing is presented as a tool-free way to move the unit between radiators.
Cons
- Battery operation requires periodic recharging, and the claimed runtime varies from 6 to 16 hours.
Technical specifications
10 specifications| Brand | KVOIDX |
|---|
| Form factor | Radiator-mounted Fan Booster |
|---|---|
| Mounting | Magnetic Fixing |
| Intended use | Indoor |
| Battery capacity | 5200mAh |
|---|---|
| Cordless operation | 6 to 16 hours |
| Charging connection | USB-C |
| Special features | Cordless, Intelligent Thermostat Sensor, Magnetic Fixing, Rechargeable Battery, Ultra Quiet |
|---|---|
| Colour | Slivery |
| Noise claim | Less Than 25dB |
What to know before buying
- The listing claims 6 to 16 hours of cordless operation and noise below 25dB, but gives no test conditions for either figure. Its claim of reduced energy use and faster room warming is not accompanied by measured results. Check radiator compatibility and magnetic attachment before purchase. The colour is listed as “Slivery”.
Who is it for?
A good fit for
- People seeking a radiator-mounted air circulator that can be repositioned without a nearby power outlet.
- Bedrooms, living rooms or home offices where adjustable airflow is useful, subject to the listing’s unverified noise claim.
Less suited to
- Buyers who need a specified, independently verified runtime or noise level.
- People seeking a standalone room heater rather than a fan booster for a radiator.
Customer reviews on Amazon
- 5 stars
86% 86% - 4 stars
14% 14% - 3 stars
0% 0% - 2 stars
0% 0% - 1 star
0% 0%
No customer comments are supplied. Aggregate ratings are strongly positive in this small sample, but ratings alone do not show how the booster performs, how long its battery lasts or whether it suits a particular radiator.
Frequently asked questions
How long does the battery last?
The listing claims 6 to 16 hours of cordless operation per charge. It does not state the conditions behind that range.
How does it attach to a radiator?
The listing describes magnetic, tool-free fixing and says the unit can be lifted and moved. Compatibility and attachment strength for a particular radiator are not independently confirmed.
Can the fan speed be adjusted?
Yes. The listing specifies three speed settings.
Does it need a nearby power outlet while running?
The listing describes it as cordless and rechargeable, with USB-C charging. It does not provide further charging-time details.
