Lithium-ion batteries are rechargeable batteries found in many everyday devices, including cellphones, laptops, e-bikes, and power tools. While they are convenient and widely used, they can become dangerous if they are damaged or not used, charged, or stored properly. A damaged or overheated battery can catch fire, release dangerous gases, or even explode.

Safety Concerns

Lithium-ion battery fires can happen for several reasons, including physical damage, electrical problems, extreme temperatures, and product defects. Physical damage can occur when a battery is punctured, crushed, or exposed to water. Electrical problems can happen when a battery is overcharged or used with charging equipment that is not designed for that battery.

Lithium-ion batteries store a large amount of energy in a small space. If that energy is released suddenly, the battery can produce intense heat, start a fire, and release dangerous gases.

General Safety Tips

DO

• ✓ Follow the manufacturer’s instructions for using and caring for your battery.
• ✓ Use the battery and charging equipment designed for your device.
• ✓ Plug chargers directly into a wall outlet.
• ✓ Store batteries and devices in a cool, dry place away from heat sources.
• ✓ Unplug the charger when the battery is fully charged or no longer needs charging.
• ✓ Purchase devices that have been tested and certified by a recognized safety testing organization, such as UL Solutions.

DO NOT

• ✖ Do not use aftermarket or generic batteries or chargers that are not designed for your device.
• ✖ Do not plug chargers into power strips or overload electrical outlets.
• ✖ Do not overcharge batteries or leave them charging overnight or unattended.
• ✖ Do not place batteries or devices in direct sunlight or near heat sources.
• ✖ Do not throw lithium-ion batteries in the trash. Dispose of them properly at a battery recycling location.
• ✖ Do not attempt to repair damaged batteries or devices yourself. Repairs should be completed by a qualified professional.
• ✖ Do not store large lithium-ion batteries, such as those used in e-bikes and scooters, inside living areas. Store them in garages, outdoor storage areas, or other non-living spaces when possible.
• ✖ Do not charge batteries under pillows, on beds, or near couches or other flammable materials.

Battery Disposal

Lithium-ion batteries and devices that contain them should never be placed in garbage or recycling bins. Batteries can cause fires during collection, transportation, or at waste and recycling facilities. They also contain materials that must be handled properly to protect the environment.

Dispose of lithium-ion batteries through a household hazardous waste program or approved battery recycling location.

San José residents can use Santa Clara County’s Household Hazardous Waste (HHW) program by scheduling a free drop-off appointment at www.HHW.org. Other locations that may accept lithium-ion batteries at no cost include Best Buy, Office Depot, and many Ace Hardware, Home Depot, and Lowe’s stores.

What to Do in an Emergency

If a lithium-ion battery begins smoking, sparking, overheating, or catches fire, leave the area immediately and make sure everyone gets to a safe location. Close doors behind you as you leave to help slow the spread of smoke and fire.

Do not try to put out a lithium-ion battery fire yourself. These fires can spread quickly and may release dangerous gases. Once you are safely away, call 9-1-1 and tell the dispatcher that a lithium-ion battery is involved. Only trained emergency responders with the proper protective equipment should handle lithium-ion battery fires.