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Can the CR2032 Button Cell Be Charged? Does Button Cells Explode When Thrown in Water?

charged or throw in water

Because of its small size, button batteries have been widely used in various micro electronic products. Now I will introduce to you whether CR2032 batteries can be charged? Do button cells explode when thrown in water?

#1-Can the CR2032 Button Cells Be Charged?


CR2032 can not be charged!
CR2032: Lithium manganese dioxide battery, which is named according to the IEC standard. Among them, C- represents a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode, R- represents the shape of the battery is cylindrical, if it is a square, F is replaced; 20 represents the diameter of the battery is 20mm, 32 represents the battery Height is 3.2mm. The nominal voltage is 3.0V, the end point voltage is 2.0V, and the nominal capacity ranges from 200-240mAh. The capacity of CR2032 produced by most manufacturers is 210mAh, and the capacity of Japan’s Panasonic is 220mAh (Nominal capacity).

The voltage of the CR2032 battery is 3V. In fact, the voltage of the new battery is about 3.4V. The voltage of the high voltage 3V is a virtual voltage, which means that the voltage time from 3.4V to 3V is relatively short! button lithium battery is an environmentally friendly battery, and the evaluation criteria are: capacity, storage time, The nominal capacity of CR2032 is 210mAh (it is the working current multiplied by the working time, that is to say, if you continuously discharge with a current of 0.01mA, you can work for about 210/0.01=21000 hours). Now the more famous CR2032 button battery brands are Panasonic, Sony, Mitsubishi, RANAT, etc. are 220mAh, and the battery storage time of these brands can reach 5 years.

At present, after the continuous improvement of lithium manganese dioxide batteries by Chinese battery manufacturers in recent years, the performance has become more and more close to the level of Japanese batteries, especially the domestic first-line manufacturers. At present, some CR batteries of famous brands such as Japan, or most of the batteries are made in Chinese foundries.

#2-Will the Button Battery Explode When Thrown Into Water?

throw in water

A depleted button battery, taking a 3V battery as an example, the button battery will not explode if it falls into the sewer! In fact, button batteries are washed with water before leaving the factory!
Button battery refers to a battery that looks like a button, which is actually a lithium battery. Lithium is the lightest metal, so lithium batteries have the advantages of light weight, durability, high stability and long-lasting power. The disadvantage is that the power is small and the cost is high. Therefore, the use is mostly limited to precision instruments.

CR button batteries, in addition to CR2032, are more commonly used CR2025 and CR2016. The main difference between these batteries is the size. CR2016 means 20mm in diameter and 1.6mm in thickness, CR2032 means 20mm in diameter and 3.2mm in thickness, CR2025 means 20mm in diameter and 2.5mm in thickness. The voltages of these batteries are all the same. Their structure, performance, and working principle are also the same. So it can’t be charged.

The button cells that we supply , the performance is close to the level of Japanese button cells. The battery capacity is high and the safety performance is good. I hope more colleagues or customers will come to consult and exchange.

Carl Zhang

Carl Zhang

I am a senior sales with 15 years in the battery industry and a bachelor's degree in economics.
I will be sharing some of my expertise on batteries and my insights into the battery industry in my blog, which should help you with your purchases in China.

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