Lithium-ion batteries are a type of rechargeable battery that power many devices devices that we commonly use every day, such as cellphones and laptops. While these batteries are convenient, they can overheat, catch on fire, release toxic gases, or even explode if they are damaged or improperly used, charged, or stored.  

Safety Concerns

Lithium-ion battery fires happen for a variety of reasons, such as physical damage (e.g., the battery is penetrated, crushed, or exposed to water), electrical damage (e.g., overcharging or using charging equipment not designed for the battery), exposure to extreme temperatures, and product defects. Lithium-ion batteries store a lot of energy in a small space. When that energy is released in an uncontrolled manner, it generates heat that can turn certain parts of the battery into flammable and toxic gases.

General Safety Tips

• ✓ Follow the manufacturer’s battery-care instructions.
• ✓ Use the battery that is designed for the device.
• ✓ Use the charging equipment that came with the device.
• ✓ Plug chargers directly into an electrical outlet.
• ✓ Store batteries and devices at room temperature. 
• ✓ Store batteries and devices away from heat sources.
• ✓ Stop charging a battery once it is full.
• ✓ Purchase and use devices certified by a Nationally Recognized Testing Laboratory UL (Underwriters Laboratory). 
• ✖ Do not use aftermarket or generic batteries or chargers.
• ✖ Do not plug chargers into a power strip or overload an outlet.
• ✖ Do not overcharge or leave the battery charging overnight.
• ✖ Do not place batteries in direct sunlight.
• ✖ Do not put lithium-ion batteries in the trash.
• ✖ Do not try to repair batteries or devices yourself. Repairs should be performed by a qualified professional. 
• ✖ Do not charge a battery underneath your pillow, on your bed, or near a couch.

Battery Disposal

Lithium-ion batteries and the devices that contain them should not go in garbage or recycling bins. They can cause fires during transport or at landfills and recyclers. They also contain chemicals that contaminate the environment if not properly processed. All batteries should be disposed of as hazardous waste.

San José residents can take advantage of Santa Clara County's household hazardous waste (HHW) disposal program by scheduling a free drop-off appointment at www.HHW.org.