Find spare batteries, bulbs and filters by size and model

The clock needs batteries, and you are almost sure there is an unopened pack somewhere. Filters are harder: two plain boxes look alike, and you cannot remember which fits the bedroom purifier.

Copy the size or model before you put it away

For batteries, record the size, such as AA. For a bulb, include the fitting and the details you need to choose it again, such as E26 and warm white. For a filter, copy the model from the packaging and note the appliance it fits. You do not need to copy the instructions; the record only has to help you find the spare.

Give the spare a box and a device note

In this example, Office → Closet → Shelf holds P01 for the spares you reach for most, P02 for older adapters and P03 for small repair supplies. P01 contains eight AA cells, two E26 LED bulbs and an air-purifier filter marked F-01. Decide whether you count batteries by the cell or by the pack, then stick with it.

Search for the appliance you are fixing

In TraceNook, record “AA batteries” with “For the wall clock” in the note and “Air purifier filter F-01” with “Bedroom purifier.” Search “wall clock,” “F-01” or “bedroom purifier” and TraceNook shows the matching item and the box it is in. That beats trying to recognize a plain filter box on sight.

A photo helps tell two boxes apart, but put the model number in the name or note as well so you can search for it. You can also scan the barcode on the pack and search by that later. TraceNook does not look products up online, so the model and the appliance it fits still come from you.

Update the count when you use a spare

Put two AA cells in the clock and change the recorded quantity from eight to six. When you buy another pack, add the actual number of cells to the same record. Search, photos and quantities are all in the free version, with no account and nothing sent to a cloud. If you have a lot to enter at once, type it from a computer browser on the same Wi-Fi.

For spares you never want to run out of, set a Stock alert on the item and it shows under Expiry & stock once the count drops that low. The restocking guide shows how to pick the number.