Things fail while you are not using them

Most explanations of storage related deterioration stop at the point where it starts to matter. This one carries on.

What happens during idleness

Lubricant drains away from surfaces under gravity, leaving them dry at the moment of the next start. Seals in contact with a stationary shaft take a set at that position, which can cause a leak when motion resumes. Condensation forms inside equipment as temperature cycles, and moisture inside an unpowered enclosure has nowhere to go.

Elastomers and plastics continue their chemical ageing regardless of whether the product is used. Rodents and insects find undisturbed equipment attractive, and wiring damage is a common and expensive result.

Where to store things

Temperature stability matters more than temperature itself, since cycling drives condensation and mechanical stress. Lofts and garages are the worst common locations, combining extremes of temperature with humidity and pests.

Interior cupboards and heated spaces are far kinder, and the difference over several years is substantial. Off the floor and away from external walls reduces exposure to damp, which is the single most damaging factor. Direct sunlight through a window delivers ultraviolet exposure indoors and should be avoided for anything plastic or rubber.

Preparing something for storage

Clean and dry the item thoroughly, since residues hold moisture and organic material attracts pests. Drain water from anything that holds it, particularly where freezing is possible, because expanding ice splits housings and pipes.

Fuel systems need attention, since petrol degrades over months and can leave deposits that block small passages. Apply a light protective film to bare metal, and relieve tension on springs and belts where the design permits. Cover loosely with something breathable rather than sealing in plastic, which traps moisture against the item.

Batteries in storage

Lithium cells degrade fastest when held at a high state of charge in a warm place, which is exactly how most people store them. A partial charge, commonly cited as around half, and a cool location slow the degradation considerably.

Judged against the category, cells left to self-discharge below their minimum voltage can be permanently damaged and are unsafe to recharge. Alkaline cells left inside a device are the classic cause of leakage that destroys contacts and circuit boards.

Removing batteries from anything going into storage is a small habit that prevents a common and irreversible failure.

Checking on stored items

A brief periodic check catches leaks, corrosion and pest activity while they are still recoverable. Turning shafts by hand redistributes lubricant and prevents seals from setting permanently at one position. Running equipment briefly, where practical, circulates lubricant and exercises seals and contacts.

Rotating stored consumables so that older stock is used first prevents discovering that spares have perished. A note of what is stored where saves the familiar experience of buying a replacement for something you already own.

Manufacturer figures are measured under conditions the manufacturer chose.

Bringing something back into use

Inspect before powering anything, looking for rodent damage to cables, corrosion at contacts and perished hoses. Expect seals to weep initially and give them a chance to recover before concluding that something has failed. Replace fluids that degrade with time rather than with use, since age alone can render them ineffective.

On the bench, test at low load first, which reveals problems before they become expensive. This site does not test storage methods, so manufacturer storage guidance and category-specific advice are the sources worth following.

The takeaway

Storage is a slow use, not a pause, and preparing for it costs less than the damage it prevents.

Buy for the failure you can live with, not the feature you will use twice.