What is about 18650 battery?

Do you know about the difference between 18650 rechargeable batteries and normal disposable batteries?
Here we simply understand what is 18650 battery


What is an 18650 battery?

18650 batteries are lithium-ion batteries. The name comes from the specific size of the battery: 18mm x 65mm. In terms of size, it's bigger than an AA battery. The voltage of the 18650 battery is 3.6v, and the capacity is between 2600mAh and 3500mAh (milliampere hours).18650 batteries are considered "high drain batteries". This means that the battery is designed to produce a high output voltage and current to meet the power demands of the portable device using it.

Hence why these powerful little batteries are used in more complex, power-hungry electronics that require a constant high level of power to operate. It also has a high depth of discharge, which means the battery can be drained all the way to 0% and still have the ability to fully charge the battery.

How the 18650 battery works

There are two types of 18650 batteries: protected and unprotected. As a rule of thumb, we always recommend using protected 18650 batteries. The 18650 protected battery has circuitry embedded within its packaging. This circuit protects the battery from "overcharging" and "overdischarging". Both of these situations are what you want to avoid. When a battery is overcharged, it can overheat, burst or catch fire.

lithium-Ion battery work

When the battery is charging, the positive lithium cobalt oxide releases some lithium ions, which travel through the electrolyte to the negatively charged graphite electrode on the other side of the battery. The ions stay there until the battery is used, during which time the lithium ions return to the positive electrode, generating energy and powering the battery. In both charging and discharging, electrons flow in the opposite direction of the ions surrounding the battery's external circuit. The flow of ions through the electrolyte and electrons through the external circuit is an interrelated process. One does not happen and cannot happen without the other.

18650 Battery Storage Best Practices

18650 batteries need to be stored in a dry, room temperature space. Avoid any conditions that may expose the battery to extreme cold or heat. A range of -20 to +50°C (-4°F to +122°F) is adequate, but optimal storage is around 77°F or 25°C. If you plan to store the battery for a long time, it is better to charge the battery to about 50% rather than 100%. Over time, this will help extend the life of the battery. Always remove the battery from its application before long-term storage. For example, if you use rechargeable batteries in a flashlight, remove them and store them separately.

Pro tip: Never store batteries in pockets or bags with any metal objects like keys, pins, or coins. This may cause accidental discharge.

Post time: Jun-12-2018