Old smartphones and batteries could spark fires—here's how to stay safe

Old smartphones and lithium-ion batteries can pose hidden risks if not handled properly. Leaving devices unused for years may lead to fires due to battery degradation. Yet, with the right care, these items can be safely stored, recycled, or even sold for profit. Lithium-ion batteries degrade over time, especially when exposed to extreme temperatures or left unused. Heat, cold, and aging can weaken them, increasing the chance of overheating or fires. To prevent damage, experts recommend storing batteries with a charge level between 40 and 60 percent in a dry place, ideally between 0 and 45 degrees Celsius.

Regularly checking and partially recharging batteries helps avoid deep discharge, which can permanently harm them. They should also be kept on non-flammable surfaces and away from other combustible materials. When disposing of old devices, throwing them in household trash is both unsafe and wasteful. Batteries can ignite during waste processing, and valuable raw materials are lost. Instead, they can be taken to local recycling centres or designated collection points. In Germany, electronics retailers, dealers, and supermarkets are legally required to accept old devices for free recycling. Before recycling or selling a smartphone, resetting it to factory settings protects personal data. Some older tech, now considered retro, may even have value to collectors.

Proper battery maintenance reduces fire risks and extends device lifespan. Recycling or selling old electronics ensures valuable materials are reused and prevents hazards. Following these steps keeps both people and the environment safer.