NIIMBOT B21S Guia De Inicio Rapido página 13

6. Do not expose batteries to fire or heat; do not squeeze or cut the battery
pack with mechanical devices, which may cause an explosion.
7. Do not expose batteries at high temperatures, which may cause explosion
or leakage of flammable liquids or gases. Extreme low air pressure may
also cause explosion or leakage of flammable liquids or gases.
8. If smoke or smell comes from the product or the power adapter, please
unplug the power adapter immediately and avoid any burns.
*Important
1. Please use NIIMBOT label paper to prevent print quality issues or printhead
damage;
2. Please stop using the product immediately when the battery cannot provide
enough power;
3. The product comes with a built-in rechargeable battery. Do not throw it
into fire or heat it. Do not charge, use or store it in a hot place, as this may
cause overheating, fire or explosion.