Self-Heating Gadgets: Best Cheap & Free-to-Run Options 2024

As winter continues, finding affordable ways to stay warm is top of mind for many.

With energy costs remaining high, even using electric heaters and blankets can significantly increase heating bills.

Eight self-heating gadgets were tested to determine their effectiveness in providing warmth without electricity.Credit: Oliver Dixon

But there are numerous gadgets promising to keep you cozy without running up costs. But do they actually work? Lynsey Hope tested eight options to find out, revealing which ones delivered and which left her feeling chilled.

Silentnight Heat Genie Self-Heating Giant Blanket

Electric blankets are increasingly popular for their affordability, but tangled cords can be a nuisance. This blanket offers a solution: it doesn’t need to be plugged in. Instead, it utilizes a unique heat-reflecting foil layer to bounce your body heat back to you, providing warmth and comfort without electricity. The plush sherpa fleece interior adds to the cozy experience. At £40, it’s generously sized for a king-size bed, washable, and proved highly effective.

• Value for money: 4/5
• Performance: 5/5
• Overall score: 9/10

Aroma Home 3 in 1 Hot Water Bottle Heat Wrap

The wrap is ideal for staying warm while working from home or even cooking in a cold kitchen.Credit: Oliver Dixon

Essentially a pouch for a hot water bottle, this wrap is well-designed and comfortable. The front pocket is perfect for warming hands, and the material is plush, thick, and well-made. Heat transfer was effective, making it ideal for home offices or chilly kitchens. However, the slim fit might not suit everyone.

• Value for money: 3/5
• Performance: 3/5
• Overall score: 6/10

OHS Coffee Cup Microwaveable Hottie

A microwaveable hottie shaped like a coffee cup offers a cute and playful way to stay warm at night.Credit: Oliver Dixon

Priced at just £4, this microwaveable hottie shaped like a takeaway coffee cup proved a lifesaver for an eight-year-old who dislikes cold beds. Its soft fleece feel and cute design were instant hits. Simply microwave the pouch with a glass of water for 20 to 50 seconds for soothing warmth.

• Value for money: 4/5
• Performance: 4/5
• Overall score: 8/10

HotHands Hand Warmers

• £1.29 for one pair, robertdyas.co.uk

These hand warmers provide long-lasting warmth for a remarkably low price.Credit: Oliver Dixon

Surprisingly, these £1.29 hand warmers delivered over ten hours of warmth. They’re great for outdoor events like football games or cold walks, and would be useful for skiing or sledding. Simply open, shake, and enjoy hours of heat generated by the oxidation of iron fillings. The only drawback is their disposable nature.

• Value for money: 5/5
• Performance: 5/5
• Overall score: 10/10

The Heat Company Insole Foot Warmers

Amazon offers these insole foot warmers at a competitive price.Credit: Oliver Dixon

These foot warmers provide hours of toasty comfort, lasting at least eight hours. They’re perfect for slippers or shoes. Heat is generated by the oxidation of iron powder inside, and they contain 100% natural ingredients, available in sizes up to 11. Very effective.

• Value for money: 4/5
• Performance: 4/5
• Overall score: 8/10

Silentnight Heat Genie Self-Heating Oversized Hoodie

The £32 hoodie is ideal for staying warm while tackling chores around the house.Credit: Oliver Dixon

Like the blanket, this hoodie features a heat-reflecting foil layer for warmth without electricity. It’s soft and cozy, and while the blanket is best for lounging, the hoodie is great for doing jobs around the house. The “one size fits all” claim might be snug for those over a size 12. It’s made from machine-washable polyester.

• Value for money: 3/5
• Performance: 4/5
• Overall score: 7/10

Suzzipad Microwavable Heated Slippers

These slippers provide around 20 minutes of warmth after a short microwave session, though their durability is questionable.Credit: Oliver Dixon

While not the most stylish, these slippers provided 20 minutes of warmth after just 30 seconds in the microwave. The faux fur exterior and plush interior are cozy and easy to slip on. Heat distribution was even, and they’re intended to boost circulation and relax feet. However, their durability is a concern.

• Value for money: 3/5
• Performance: 3/5
• Overall score: 6/10

Hot Water Bottle Foot Warmer

This foot warmer is best suited for stationary use, like at a desk or on the sofa.Credit: Oliver Dixon

This foot warmer appeared less padded than advertised. The polyester material is soft and thick, and the two-liter capacity provides 30 to 40 minutes of heat. However, it’s not designed for walking and may be too small for some.

• Value for money: 1/5
• Performance: 1/5
• Overall score: 2/10