Are Button Cells Rechargeable？

 

What are the button cells?

Button cells are distinguished by their shape and come in a wide variety of sizes and thicknesses. They are generally larger in diameter and thinner than cylindrical batteries, such as AAA on the market. Consumers will also most often use and throw away their button-cell batteries without checking to see if they’re rechargeable or not.

We will further explore these characteristics and applications of button cells in this article.

Classification of button cells

Button cells are usually divided into rechargeable and non-rechargeable ones. The English letters on a button-cell battery represent the type of battery while the number represents the size. The first two digits represent the diameter, and the last two digits represent the thickness.

Most button cells are one-time-use (i.e non-rechargeable, also known as a galvanic battery).  They belong to the dry battery category although they are different from the general cylindrical batteries (AA, AAA, AAAA)

Rechargeable button cells (also known as secondary batteries) are usually built into the product, such as the case in small Bluetooth headsets.

Application

A variety of micro-electronic products carry button-cell batteries because of how little space they occupy, their lightweight, easy use, and long-lasting power supply (just to name a few).  These cells have a diameter ranging from 4.8mm to 30mm and a thickness ranging from 1.0mm to 7.7mm.

They are generally used for all kinds of electronic products as backup power.  Products include but are not limited to the following: computer motherboards, electronic watches, electronic dictionaries, electronic scales, remote controls, electric toys, cardiac pacemakers, electronic hearing aids, counters, and cameras.

Features of various types of button cells

Alkaline button cell

Due to this battery’s large capacity, excellent low-temperature performance, and a low price, it can meet the demand of large current continuous discharge requirements. Its shortcomings include its insufficient energy density and an unsmooth discharge voltage.

The alkaline manganese button cell uses manganese dioxide for the positive electrode, zinc for the negative electrode, and potassium hydroxide for the electrolyte. Its nominal voltage is 1.5V, and it has a good discharge effect although it is relatively expensive. The nominal capacity is 15mAh to 140mAh. It is mostly used in electronic toys, hearing aids, lighters, watches, and so on.

Silver Zinc Oxide button cells

This type of battery uses silver oxide as the positive electrode, zinc as the negative electrode, and an alkaline solution as the electrolyte. It can be made as either a primary battery or a storage battery. Due to the high cost of silver, it is mainly used as a button cell.

This button cell has a long life and large capacity, and it is widely used. It consists of silver oxide as the positive electrode, metal zinc powder as the negative electrode, and potassium hydroxide or sodium hydroxide as the electrolyte. Electrical energy is generated through the chemical interaction between zinc and silver oxide.

This button cell also has a higher capacity than carbon or alkaline button-cell batteries. It has good voltage stability. For instance, when the battery is at 90% of its capacity, the voltage is stable at 1.45V or more; when the battery has 10% of its capacity, rapid linear discharge is down. This battery has a leak-proof effect, and it is suitable for long-lasting use. It is commonly used in hearing aids, cameras, watches, calculators, and other applications.

In addition, button-cell batteries that use zinc electrodes, such as alkaline batteries, silver oxide batteries, zinc-air batteries, may contain mercury due to the manufacturing process. Therefore, it is necessary to observe whether the battery case is marked with mercury content.

Lithium polymer button cell batteries

These are the best of all the button-cell batteries especially since they are rechargeable and mercury-free. Currently, Grepow’s rechargeable button-cell batteries are lithium polymer batteries and are widely used in hearing AIDS, earbuds, thermometers, watches, and so on.  Grepow’s button-cell batteries can be specially designed to have a wide temperature range of -50℃ to 50℃ or -20℃ to 80℃.

 

At present, there are two models in mass production: GRP1054 and GRP1254. Others can be made according to your products’ size, discharge capacity or demand, cycle life, discharge current. Some other special requirements, such as fast-charging, low-temperature use.

If you want to know more about button cells, please continue to follow our blog.

If you are interested in our products, please contact us at info@grepow.com.
Official website: www.grepow.com

Can you replace battery in Bluetooth headset?

1. Can I replace the Bluetooth battery?

My favorite Bluetooth headset loses power quickly and the headset “dies” in the middle of a conversation. Can I replace the Bluetooth battery?

Typically, batteries cannot be replaced in Bluetooth headsets; however, this is dependent upon the headset you’re using. Contact us and we can help determine if a replacement battery is available for your BlueParrott, Jabra, Plantronics, Sennheiser, or VXi headset.

2. Is there a replacement battery?

The battery that came with my Bluetooth headset has been lost. Is there a replacement battery* available? *

Yes, we have lots of batteries for your Bluetooth headset. Simply find your headset by using the “Search” bar on our web site, find your battery, and click on the product listing. A complete list of available batteries will be displayed. If your headset has been discontinued, don’t despair! We have batteries for some older model headsets. Of course, we can also customize the battery for your Bluetooth headset– simply give us a call and we can help.

3. How do I pair my Bluetooth headset with a smartphone or tablet?

No matter which device you’re using, you will need to enable Bluetooth in the Settings menu of your device and your headset will need to be powered “on” and be placed in pairing mode. That way, the headset, and phone/tablet can communicate and connect (or, pair). Follow the prompts on the smartphone/tablet and pairing is complete.

NFC (Near Field Communication) pairing is also available for some phones and headsets. Contact us for additional help with pairing/connecting your Bluetooth headset to your smart device.

4. Is there a way to change the wearing style of my Bluetooth headset?

This is dependent upon the headset that you choose. Some headsets offer a choice in wearing styles; while others may have an add-on piece that can be purchased.

5. Can I use my Bluetooth headset with my laptop/PC?

Yes, provided you have a UC version of the headset. In plain English, a “UC version” is enabled to connect to a PC/laptop via the included Bluetooth dongle that will plug into your laptop/PC via USB. The dongle must be paired to the headset out of the box. Contact us to ensure you have a UC headset.

Bluetooth headsets are incredibly useful, and more intelligent than ever, with voice-activated commands in some models. When you have the right tools, taking and making calls, listening to music, and participating in webinars become second nature. Take advantage of these headsets to streamline your work and life! And with all of the wearing options available, the right headset is just waiting for you.

Contact us at info@grepow.com and we can determine the best Bluetooth headset battery for your needs.

What Affects the Lifespan of LED Power Supplies?

An LED power supply is a device that provides electrical energy for lighting and the components in a computer. It supplies are widely used in the following: street lights, tunnel lights, LED grille lights, LED indoor lights, LED ceiling lights, buildings, bridges, square construction facilities, lawn lights, curtain wall lights, display panels, dynamic billboards, simulations, stadiums, car indicators and internal reading lights, car brake lights, tail lights, turn signals, sidelights, explosion-proof lamps, mining lights, etc.

To avoid power failure, it is important to consider many aspects of an LED power strip from how the LED chips and power are installed to the space that the power strip will be installed in (is it a small space) and the heat dissipation.

Factors that affect the life of an LED power

Grepow believes that environment characteristics, components, and electrical characteristics are factors that affect the life of an LED power supply. These include the following:

The actual application of environmental

The actual application of environmental impact: high humidity, high temperature, dusty environment, strong magnetic environment, and vibrations.

Lighting and temperature environment

The impact of the lighting and temperature environment: lighting internal temperature ＜65 ℃, lighting shell＜75 ℃, and power supply temperature ＜ 60 ℃.

 The power supply grid

The impact of the power supply grid: unstable grid voltage input impacts the LED power components, thus affecting the life of the LED drive pulse.

Schematic diagram of the LED drive power supply

Insulation and installation

Insulation and installation of the impact: the correct installation of the product and good insulation will enhance the application of an LED power supply.

 Electrolytic capacitors

The influence of electrolytic capacitors: electrolytic capacitors will leak out of the sealing part of the electrolyte vaporization. It is generally believed that with every 10 ℃ temperature rise, the leakage rate will double.

Furthermore, the normal working life of an LED power supply depends on the life of the electrolytic capacitor, and the life of the electrolytic capacitor depends on the life of the capacitor itself and the working temperature.

The life of the capacitor at 65 ℃ can only guarantee about 80,000 hours and, at 75 ℃,  about 40,000 hours. The life of the capacitor at 85 ℃ can only guarantee about 20,000 hours and, at 95 ℃, can only guarantee about 10,000 hours. From the above example, it is clear that the life of the capacitor will be halved every time the temperature of the electrolytic capacitor rises by 10℃.

The impact of switching times

Most power supplies are equipped with capacitor input rectifier circuits. When the power supply is connected, inrush current will be generated, resulting in fatigue of the switch contacts. This in turn causes problems such as increased contact resistance and adsorption.

The peak value of the power when the LED power supply is turned on is tens to hundreds of times the rated value, which results in thermal fatigue of the resistor and a circuit break. Thermal fatigue resistors in the same situation will also produce thermal fatigue.

LED drive power supply has many advantages such as environmental protection, long life, high photoelectric efficiency (current light efficiency has reached 100LM/W), anti-vibration, etc. In recent years, applications in various industries have developed rapidly, and designers should deepen their understanding of LED drive power supply to improve the life of LED lamps and lanterns.

If you are interested in LED batteries, follow the link for more information: https://www.grepow.com/page/shaped-battery.html