Lithium-ion (Li-ion) batteries are becoming more prevalent in our daily lives. They power many devices that we now rely on. These devices include mobile phones, tablets, E-cigarettes/vapes, wheelchairs, E-bikes/scooters, power tools, drones, video games, and toys. With the increased reliance on lithium-ion batteries comes an increase in new safety risks. Li-ion batteries have the potential to overheat, catch fire, and even cause explosions if they go into “thermal runaway”.
“Thermal runaway” occurs when the inside temperature of the battery increases so fast that the battery can’t dissipate the heat. The battery then enters an uncontrollable “self-heating” state: thermal runaway! But did you know that there are things you can do to stay safer while charging lithium-ion batteries and devices? It starts with watching out for the warning signs.
The warning signs of unsafe Li-ion battery conditions include unusual smells or odors, excessive heat, puffing batteries, or hissing or popping sounds. If any of these occur, stop charging the device immediately.
Here are some safety considerations to consider when charging Li-ion batteries and devices:
- Only use the charging cord and charger that came with the device. Do not modify the cord or charger in any way. Follow the manufacturer’s instructions.
- Always plug the charger or device directly into the wall; do not plug into a power strip.
- Only charge one device or battery at a time to avoid overloading electric circuits.
- Charge Li-ion batteries at temperatures between 32ºF (0ºC) and 105ºF (40ºC).
- Do not charge batteries or devices on pillows, on a bed, or on a couch.
- Charge larger devices away from exit doors or your exit path out of a room.
- Do not charge larger devices overnight.
- Never leave any Li-ion battery or device unattended while charging.
And, lastly, share what you have learned about lithium-ion battery safety with others!