Early cell phone batteries did not last long. The technology that powers modern mobile phones is based on the old two-way radios used in taxis and police cars in the 1940s. The Swedish Police Service used the first mobile phone in 1946. This phone uses the principle of radio transmission and has six calls before the battery runs out. The first battery used to operate a mobile phone is actually a car battery directly connected to the mobile phone, rather than a separate battery like today's mobile phones. Most early mobile phones can only be used in vehicles because they require such a large amount of battery power.

The small batteries available today have not yet been invented. In addition, these early mobile phones were very large, heavy, and bulky. For example, Eriksson had a mobile phone in the 1950s, which weighed astonishingly 80 pounds! By the late 1960s, existing mobile phones only worked in a cell phone call area, and once the user left the designated call area for a certain distance, they could not work at all. An engineer at Bell Labs developed this technology in the 1970s.

When the first prototype of a modern mobile phone appeared in 1973, this mobile phone could be used independently and could work in multiple calling areas. These phones look like the stylish and compact flip phones and smart phones we have now, and they can only run for 30 minutes without the phone battery to charge.

In addition, these short-life batteries take a full 10 hours to charge! Compare this with the current ability to charge a mobile phone in a few minutes through a household power outlet, a car charging outlet, or even USB charging.

Mobile phones continue to evolve and improve over time.

In the 1980s, mobile phones began to become more popular and more practical, but due to the large demand for batteries in early models, they were still important for use in automobiles. Few people can carry it outside the car, and the term car phone is often used for these devices. Some are built into briefcases and can also hold the large cell phone batteries needed to power them.

By the 1990s, mobile phones and their batteries were getting smaller and smaller, and the networks running them were constantly improving. Telephone systems such as GSM, TDMA and CDMA came into being, and by 1991 there were even digital telephone networks in the United States and Europe. These phones can be carried with you, and advances in the manufacture of small batteries and computer chips have made them heavier between 100 and 200 grams, a great improvement compared to the 20 to 80 pounds of bricks in previous years, or A briefcase-sized cell phone battery to run them.

Smartphones revolutionized modern mobile phones

Fast forward to 2018, and almost everyone has a smartphone. Compared with the first original phones in the 1950s, smartphones are similar to things in Star Trek! You can call friends, enjoy video chats, download your favorite tunes, send texts, and even book dinner, while ordering some flowers and chocolates to deliver your appointment. The batteries strapped to car batteries from mobile phones have also come a long way. In the past few decades, there have been several types of cell phone batteries.

Ni-Cd mobile phone battery

In the 1980s and 1990s, nickel-cadmium batteries or nickel-cadmium batteries were the batteries of choice. The important problem is that they are bulky and heavy, which makes mobile phones bulky and heavy. In addition, after you charge them a few times, they build up the so-called memory effect and they don't always keep charging. This leads to dead cell phone batteries, which means spending more and more money to buy more. These batteries also have a tendency to become hot, which can cause interference, and one of the components in the battery is cadmium, which is toxic and needs to be disposed of after the battery is exhausted.

NiMH batteries

The next round of mobile phone batteries is nickel-metal hydride, also known as NiMH, which began to be used in the late 1990s. They are non-toxic and have less memory effect. In addition, this type of battery is thinner and lighter. In addition, they can be charged in a shorter period of time and allow users to talk for longer before death

Lithium Ion Battery

Next, lithium-ion batteries were developed. They are still in use today. They are thinner and lighter and have a longer lifespan. It takes less time to charge. They can be made into many different shapes and sizes to fit different styles of mobile phones, so any company can use them in their mobile devices. There is no memory effect to worry about, so they can be charged multiple times, and they are safe for the environment. However, they are much more expensive than older battery models.

Lithium Polyion Battery

The latest development of mobile phone batteries is the lithium polymer icon, or lithium polymer battery, whose power is 40% higher than the old Ni-MH battery. They are super light, and there is no memory effect that can cause charging problems. However, these batteries have not yet been widely used, and they are still quite rare.

All in all, the technology of mobile phones and their batteries has made great strides in a relatively short period of time. 1. Poor battery protection circuit or no protection circuit: This situation often occurs in mobile phones with removable batteries. Many users like to buy relatively cheap non-original batteries, and these batteries usually cut corners in order to maximize profits. The protection circuit of the battery itself is prone to problems, and the battery cell swells. Regarding lithium-ion batteries, an explosion occurs when the battery cell expands to a certain extent.

2. Poor performance of the charger: The battery problem caused by the charger should be the most common. In many cases, users may not care about the choice of mobile phone charger and often take a charger at hand for charging. These chargers may be cheap chargers sold on the street without a complete protection circuit system, or they may be chargers for household tablet products. The charging current is likely to be relatively large, and occasionally the charging problem is not big, but if it is a long time Use, it is very likely that the battery will swell.

Especially some users like to play while charging, leaving the phone in a high temperature environment for a long time. Continuous floating charging at high temperature will cause side reactions of the electrolyte. Doing so for a long time will seriously affect the battery life and the problem of swelling. It is easy to appear.

3. The mobile phone is not used for a long time: If the mobile phone is not used for a long time, the battery will swell. This is because the battery will be stored for a long time, the voltage will drop below 2V, and a chemical reaction will occur inside, which will cause the lithium-ion battery to swell. This is also the reason why many friends generally find the battery of the mobile phone bulging when disassembling old mobile phones. So if you want to store the battery for a long time, the most reliable way is to charge it to a half-charged state regularly.

How to prevent problems

Generally, there are two types of lithium-ion batteries: lithium-ion polymer and lithium-ion batteries. The former has no electrolyte. The problem is that it swells and bursts into the shell before it catches fire. It does not explode suddenly. It has a certain warning and is relatively safe. a little. When we can choose, we try to buy this kind of battery.

For users, it is best to use the mobile phone for daily charging (even if the battery is removable) and use the original charger for charging. Try to avoid using third-party chargers, or universal charging (for removable batteries). Don't try to buy third-party compatible batteries (removable batteries) at a cheap price, and try not to play large games or run programs that make your phone hot while charging.