Disposing of Connected Devices and Batteries Responsibly

Why disposal needs thought

A connected device is a small computer, a radio and usually a battery, wrapped in plastic. When it reaches the end of its useful life, three separate concerns come up: the materials inside, the safety of the battery, and the personal data it may still hold. Each calls for a different step, and none is well served by dropping the item in the household bin.

Rules and collection services differ from place to place, so treat this as general guidance and check what your local authority or retailers offer.

Why electronic waste is a problem

Used electronics, often called electronic waste, contain materials worth recovering, including various metals and plastics, and some that can be harmful if released, such as heavy metals or other substances that should not end up in soil or water. Recycling facilities can recover valuable materials and handle the hazardous ones in a controlled way. Landfills and incinerators are poorly suited to this.

The scale matters too. Each smart plug, sensor or tracker is small, but they are made in large numbers, and small devices are easy to forget in a drawer or bin. Part of the overall environmental footprint of the Internet of Things comes from making and discarding devices, which is a good reason to keep them in use for as long as is reasonable.

Why batteries need extra care

Batteries are the part most likely to cause immediate harm.

• Fire risk. Lithium-based cells can overheat and ignite if crushed, punctured or short-circuited. This has caused fires in garbage trucks and recycling plants.
• Leaks. Older cells left in devices can corrode and leak, damaging the device and irritating skin.
• Materials. Cells contain metals that are worth recovering and that should not be released into the environment.

For these reasons, batteries are commonly collected separately from household waste, often at stores that sell them or at local drop-off points.

Step 1: Decide whether it should be disposed of at all

Before recycling, ask whether the device still has life in it.

• Could it be used elsewhere in your home, or passed to a friend?
• Is it only the battery that has failed? Replaceable batteries make repair simple, and the right to repair is a growing topic in device policy.
• Is the device still safe to use, or has it stopped receiving updates? That question is covered in our article on how long a connected device should last.

If it still works, resale or donation keeps it out of the waste stream, as long as you wipe your data first.

Step 2: Remove your data and accounts

Many connected devices store more than people realize: Wi-Fi network names and passwords, account tokens, saved locations, recordings, voice history or schedules. Handing on a device without clearing it can expose that information.

A general order of operations:

1. Remove the device from its app or account. This frees it from your account, and in many cases it unlinks cloud data.
2. Use the factory reset. The method varies, but it is typically a button hold or a menu option. This usually clears saved network details and settings.
3. Delete cloud data if you can. Removing a device from an app does not always delete past recordings or history. Look at the account’s data controls, and consider your options around data retention.
4. Remove removable storage. Memory cards in cameras and similar devices hold footage and should be taken out and either kept or wiped.
5. Confirm the reset worked, if possible, by checking that the device returns to its setup mode.

Be aware that a factory reset is not a guarantee against a determined expert recovering data on every device. For devices that held sensitive material, such as cameras, consider physical destruction of storage or a recycler that offers secure destruction.

Step 3: Deal with the battery

• If it is removable, take the cells out and recycle them separately from the device. Replace the dead cell, rather than the whole device, where that is feasible.
• If it is built in, do not try to pry it out unless the device is designed for it. Give the whole device to a recycler that accepts electronics.
• For lithium cells, many collection programs ask you to cover the terminals with tape, or to place each cell in its own bag, to prevent short circuits.
• For swollen, hot, leaking or damaged cells, stop using the device, keep it away from anything flammable, do not charge it, and contact your local hazardous waste service for advice. A swollen battery is a safety problem, not just a nuisance.
• Do not mix old and new batteries, or different types, in storage while waiting to dispose of them. Keep them somewhere cool and dry.

Step 4: Choose where it goes

Common routes, depending on where you live:

• Retailer take-back schemes, often run at the store that sold the item or sells similar items.
• Municipal electronics collection days or drop-off sites.
• Manufacturer or reseller trade-in and recycling programs.
• Community repair groups, which sometimes take non-working devices for parts.

When businesses or public bodies retire large numbers of sensors, the same principle applies at scale. Retiring devices is part of device management, and a plan for collecting, wiping and recycling units belongs in the project from the start, along with replacement costs in the total cost estimate.

Practical habits

• Keep a record of what is installed, so old sensors are not left running unseen or forgotten in walls.
• Remove cells from devices you will store for long periods.
• Buy devices with replaceable batteries and a clear support period when you can.
• Recycle at the end of a device’s useful life, not after it has sat broken for years.

Responsible disposal takes a few minutes per device and avoids both a safety hazard and a privacy leak, which is a good trade.