# Best Emergency Heat Packs for Power Cuts and Transport Source: https://terrariumnest.com/best/best-emergency-heat-packs Updated: 2026-10-30 Publisher: Terrarium Nest. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://terrariumnest.com/how-we-research#our-score A heat pack is a short term stopgap for a power cut, a cold journey or a trip to the vet, not part of a daily setup. Air activated packs warm for a set number of hours once exposed, while gel and reusable packs give a shorter burst. What varies is duration, peak output, how quickly they reach working temperature and how much airflow they need to keep producing heat inside an insulated box. We weighed stated duration, consistency of output through that window, activation reliability and packaging that stores well until the day you need it. Long duration packs suit overnight outages and courier transit, while shorter packs suit a car ride to the vet. In every case the pack stays wrapped and off the animal so there is no direct contact, the container allows some air exchange, and temperature gets checked rather than assumed. ## Picks ### 1. Uniheat 72-Hour Heat Pack for Shipping Plants, Live Insects, Reptiles, Tropical Fish, 5 Pack Our score: 8.9/10 (Fit for the job 10/10 · Features and specs 8/10 · Build and materials 8/10 · Value 9/10) A Uniheat 72-Hour heat pack 5 Pack, made for shipping plants, live insects, reptiles and tropical fish in cold weather. Pros: - 72-Hour duration covers long shipping delays or power outages - Designed for live animal shipping, so heat output is gentle - 5 Pack gives several days of backup warmth for emergencies Cons: - Needs airflow to work, so do not seal it in an airtight container - Place it outside direct contact with animals to avoid hot spots Details: https://terrariumnest.com/product/B06X95R1FN ### 2. UniHeat Shipping Warmer 40+ Hours (4pack) Our score: 7.4/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 7/10) UniHeat shipping warmer 4 pack, listed for 40 plus hours of steady heat and sold for shipping live insects, reptiles, fish and plants. Pros: - Listed for 40 plus hours of heat, and no kneading or shaking is needed to start it. - The listing gives an average warmer surface temperature and describes it as disposable, with inner content that is biodegradable. - The product page names reptiles and live insects among its uses, so it fits transport and cold snap emergencies. Cons: - It comes as a 4 pack, not the 10 pack it replaces, so each pack costs more. - These warmers are meant for insulated boxes in transit, not as a permanent heat source for an enclosure. Details: https://terrariumnest.com/product/B006YEX6MA ### 3. Grabber Hand Warmers, Long Lasting Natural Odorless Air Activated Warmers, Up to 10 Hours of Heat, 40 Pair Our score: 6.6/10 (Fit for the job 6/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10) Grabber hand warmers, 40 Pair of air activated, odorless warmers with up to 10 hours of heat, usable as backup reptile warmth. Pros: - 40 Pair is a big stock for winter emergencies and power cuts - Up to 10 hours of heat bridges most short outages - Cheap and easy to find in outdoor and hardware stores Cons: - Made for hands, so they can run hotter than animal shipping packs - Shorter heat life than dedicated shipping warmers for long delays Details: https://terrariumnest.com/product/B06Y1K5MX1 ### 4. HotHands Hand Warmers Value Pack, 10 Pairs - America's Favorite Warmer | Enough to Share the Warmth-Air-Activated, Disposable, Long-Lasting, Dependable for Hunting, Golfing, Spectating, Camping Our score: 6.3/10 (Fit for the job 5/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10) HotHands air-activated hand warmers in a 10 pair value pack, up to 10 hours of heat per the listing. A disposable heat source that is a stand-in for reptile shipping heat packs. Pros: - The spec sheet describes air-activated warmers that start working once the package is opened, with no power or batteries needed. - Up to 10 hours of heat is stated, which covers a short outage or a cold delivery day. - HotHands is a long-established warmer brand, and a pack of 10 pairs keeps spares on hand. Cons: - These are sold as hand warmers for outdoor use, not for animals, and the manufacturer says nothing about reptile or shipping use. - The heat is not adjustable and no temperature control is offered, so keep them from direct contact with an animal. Details: https://terrariumnest.com/product/B00D7H9LIA ### 5. Ignik 8-Hour Compostable Foot Warmers with Resealable AirBarrier Pouch, 20 Pairs Our score: 6.1/10 (Fit for the job 5/10 · Features and specs 6/10 · Build and materials 7/10 · Value 7/10) Ignik 8-Hour compostable foot warmers in 20 Pairs with a resealable AirBarrier pouch, a greener backup heat option. Pros: - Resealable AirBarrier pouch can pause unused warmers for later - Compostable design reduces waste compared with standard warmers - 8-Hour warmth covers an evening or overnight outage Cons: - Foot warmers are thin and small, so heat output is limited - Adhesive-backed designs need care so they do not stick to decor or animals Details: https://terrariumnest.com/product/B0CMY1HHRW ### 6. Heat Factory Emergency Preparedness Warmer Pack, 12 Pair Hand, 6 Pair Toe, 6 Large Body Warmers, Mylar Blanket, Glow Sticks Our score: 5.8/10 (Fit for the job 4/10 · Features and specs 7/10 · Build and materials 7/10 · Value 6/10) Heat Factory's emergency preparedness warmer pack with hand, toe and large body warmers plus a Mylar blanket and glow sticks. Pros: - Large body warmers give more heat for bigger emergency containers - Mylar blanket can wrap an enclosure or carrier to hold warmth - Glow sticks help during night power cuts in the reptile room Cons: - Human emergency kit, so much of it is not useful for pets - Warmers are not designed for animal shipping, so monitor temperatures Details: https://terrariumnest.com/product/B002O0WHRS As an Amazon Associate I earn from qualifying purchases.