Although button batteries are only the size of a coin, they are the “power core” of many devices. The common CR2032 model (with a diameter of 20 millimeters and a thickness of 3.2 millimeters) is widely used in smartwatches, car keys, and remote controls. The CR1632 is suitable for electronic scales and digital cameras, while hearing aids and other devices often rely on zinc-air button batteries. With the popularity of smart wearables and Internet of Things devices, the global button battery market size reached 4.86 billion US dollars in 2025. China, with over 65% of global smart wearable production, has become the largest single market. Please provide the text you would like translated.
Hidden dangers need to be on guard: 15 minutes may cause burns
This “small round piece” hides a fatal danger. Experiments show that if children accidentally swallow button batteries, they will start to be burned within 15 to 30 minutes – the positive and negative poles of the battery form a current through the human body’s mucus, releasing strong alkaline liquid, like a “miniature electric soldering iron” corroding tissues. Ningning, who was 1.5 years old, had a perforated esophagus and was left with a lifelong disability after swallowing a battery for 10 hours. If the battery accidentally enters the nasal cavity, it may cause nasal septum necrosis and facial deformity within a few hours. Please provide the text you would like translated.
Safe Response and New Directions in the Industry
Remember three key principles for first aid: Do not induce vomiting if a battery is swallowed by mistake; do not let the person eat or drink; immediately take the battery to the hospital along with its model, as different materials require different handling methods. In daily life, keep batteries out of reach of children and reinforce the battery compartments of toys and remote controls with tape. Please provide the text you would like translated.
The industry is also upgrading: by 2028, the penetration rate of mercury-free and recyclable button batteries will exceed 40%, and the market share of rechargeable models is expected to rise from 18% to 32%. Chinese enterprises are developing medical-grade long-life batteries. In the future, small button batteries will be safer and more environmentally friendly.