Why the old tortoise is the priority in a power cut
A tortoise makes no heat of its own. When the lamps go off, his body temperature follows the room down, and everything in him — digestion, immunity, the will to move — slows with it. A young adult rides out a cold night and warms up when the power returns. A very old tortoise has far less reserve: he chills faster, warms back slower, and takes days, not hours, to return to himself afterwards. The kit exists so that on the one night it matters, you are improvising nothing in the dark with a torch in your teeth.
The warmth core of the kit
The centre of the kit is an insulated box or cool box, sized for the tortoise, with a few ventilation holes — an emergency retreat that holds heat far better than his open enclosure. Into it goes his heat source: long-lasting disposable hand warmers, the kind that run for many hours, or a hot water bottle. Whichever you use gets wrapped in a towel and placed beside him or fixed to the box wall — never in direct contact with his shell or skin, because a cold tortoise cannot feel a hot spot properly and cannot move away from it, and burns on a chilled animal are a real and ugly risk.
Add dry towels or fleece for lining and tucking around him, blankets to wrap the outside of the box for a second layer of insulation, and a battery-powered thermometer or spare probe so the temperature inside the box is a number you know, not a guess you make by hand.
The supporting items
A torch or headlamp, because everything about this job happens in the dark. Bottled water and a shallow dish — offered once he is holding some warmth, since a cold tortoise should be warmed first and fed later. A small store of dried food or pellets for the days afterwards, because fresh greens will not exist in a house with no power and no shops open. And a printed emergency sheet: your vet's number, the name of a friend or neighbour with power who could take him in if your home stays cold, and his key care details.
Using the kit on the night
Move him into the lined box with a wrapped warmer, close the lid most of the way, and check the temperature every so often, swapping warmers as they fade. Do not feed him while he is cold — food sits undigested in a cold gut — and never try to warm him fast with hot water; slow and steady is the only safe direction. Once power returns, let him warm gradually under his lamp, offer a lukewarm soak, and watch his appetite over the following days. An old tortoise who is still not eating after a couple of days at proper warmth is a conversation with the vet, not a waiting game.
A printed copy of his Pet Passport from KinsLe, stored inside the kit lid, means his age, his history and his vet contacts are in your hand on the night — not on a phone that is busy being your only light.