Lithium-ion Battery Safety

Here are a few basic safety tips regarding lithium-ion batteries to avoid overheating, explosion or fire of a lithium-ion battery …

  • Read the instruction manual of the device and any warnings before using a lithium-ion secondary battery. 


  • Be sure to recharge the battery with the specified battery charger and AC adapter. Other battery chargers or AC adapters may have different charging specifications.


  • A lithium-ion battery comes with a specified orientation of positive and negative terminals. Connecting the battery with the positive and negative terminals reversed will instead cause it to charge incorrectly, and may result in abnormal chemical reactions internally.


  • When a device is not being used for an extended period of time, remove lithium-ion secondary batteries and store them in a dry place. 


  • Keep lithium-ion secondary batteries out of the reach of children and animals to prevent the batteries from being licked, swallowed, chewed, etc. 


  • If the lithium-ion battery gives off an odor, overheats, is discolored, deforms, or reacts in anyway unusual during use, recharging or storage, remove it from the device or battery charger and do not use it again.


  • If a battery leaks or gives off an unusual odor, immediately remove it and place it away from any naked flame. The leaking electrolyte is flammable. 


  • Batteries that have no manufacturer or distributor names displayed may be fake. Fake batteries may have missing safety mechanisms that are designed to prevent accidents. Be careful when purchasing such batteries.  


DO NOT …

leave batteries in high temperature areas. Do not leave lithium-ion secondary batteries on the dashboard of a vehicle, on a window sill, or any location where they are exposed to direct sunlight, or high temperatures, such as in a vehicle parked in the sun.

leave lithium-ion batteries or secondary batteries near a heat source, such as a heater.

get batteries wet. Do not spill water, salt water, juice or other fluids on a lithium-ion secondary battery. Doing so may break the protection circuit built into the battery.

recharge lithium-ion batteries in any location where they are exposed to direct sunlight, or exposed to high temperatures, such as in a vehicle parked in the sun. High temperatures may activate the built-in protection mechanism designed to avoid accidents, preventing the battery from being charged, or the protection circuit may break, resulting in the application of abnormal current or voltage when charging.

throw lithium-ion secondary batteries into a fire or other high heat source.  Doing so may melt the insulator, damaging the gas exhaust valve and the protection mechanism.

connect the positive and negative terminals of the lithium-ion secondary battery with a metal object. Do not carry or store a lithium-ion secondary battery with metal objects such as necklaces, hair pins, coins or keys. Metal objects may short-circuit the positive and negative terminals of a lithium-ion secondary battery, resulting in a large electrical current.

throw lithium-ion secondary batteries, drop from high places, or subject them to strong impacts. Doing so may break the protection circuit built into the battery. This may result in the battery being charged with an abnormal electric current or voltage.

drive a nail into a lithium-ion battery, hit it with a hammer, or crush it under foot. This may deform the battery and break the built-in protection mechanism.

apply solder to the terminals of a lithium-ion battery. The heat will melt the insulator, damaging the gas exhaust valve and the protection mechanism. 

put a lithium-ion battery in a microwave oven, pressure container, or other such devices. Sudden heating may break the seal. 

place combustible materials on top of a lithium-ion battery when recharging or discharging.

disassemble or modify a lithium-ion battery. Lithium-ion batteries have a gas exhaust vent and a built-in protection mechanism to prevent accidents.

use batteries that work for an extremely short period of time. If the battery requires frequent charging, replace the battery with new one. 

place batteries on top of or near the electromagnetic range.

force decayed batteries into a device. Doing so may deform the lithium-ion batteries and break the internal parts or built-in protection mechanisms. 

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