The summer heat not only poses health risks for people and animals, but also for our everyday electronic companions. Cell phones, tablets and laptops should not be exposed to excessive direct sunlight. This is emphasized by the Waste Electrical Equipment Coordination Office (EAK) in view of the rising temperatures. In addition, it is strongly recommended that batteries of e-bikes, e-scooters and other electrical devices should never be charged unattended and that they be disposed of correctly. Electronic devices have become indispensable companions in our everyday lives. Whether for communication, work or entertainment - the use of cell phones, tablets and laptops is omnipresent. But especially in extreme heat, the built-in lithium batteries can heat up, which can affect their longevity and cause potentially dangerous situations. The batteries used in these devices are particularly powerful due to their high energy density and low self-discharge, but are also susceptible to overheating and damage. This is particularly problematic when temperatures rise, as is common in the summer months. Lithium is very reactive and can become easily flammable at high temperatures. This not only affects cell phones and tablets, but also other electrical devices such as e-bikes and e-scooters. In 2023 alone, around 220.000 e-bikes were sold in Austria, which also run on lithium batteries. Correct charging and disposal of batteries Improper handling of batteries can lead to serious safety risks. The EAK warns against charging batteries unattended and recommends always charging them on a non-flammable surface. It is also pointed out that damaged batteries - recognizable by melting points, deformation or leaking liquid - should be replaced immediately, as they can lead to