3.7-volt rechargeable batteries are the main part of the battery series. These batteries deliver power to many devices like phones drones, etc. Here we will cover details of 3.7-volt rechargeable batteries, like types, sizes, uses, and features. So let’s get started with an Introduction to a 3.7 Volt Rechargeable battery

Introduction to 3.7 Volt Rechargeable Battery

3.7V 100mAh Lithium-ion Li-ion Battery, also called lithium-ion polymer battery. It rechargeable battery of lithium-ion features uses polymer electrolytes than liquid.

High-conductivity semisolid (gel) polymers are used as electrolytes. These batteries offer higher specific energy than other lithium batteries and are used for tablet computers, cellular phone handsets, or radio-controlled aircraft.

Features of 3.7V 70mah Lithium-ion  Battery:

1. Its volume density is about 300mWh
2. it has a secure structure so no chances of fire, short circuit, overcharging, over current, vibration, or crush acupuncture.
3. It has 80 percent capacity after 500 cycles.
4. It has a 3.6 V discharge voltage  plateau than 42min
5. It does not have a bad affect on the environment since not come with  PB, CD
6. It has design flexibility so can used in different spaces.

Specifications of 3.7V 70mah Li-ion Battery:

• Model number= HC-1
• Voltage= 3.7V
• Capacity =100mAh
• Dimensions= Different sizes
• Standard charge current =0.2/0.5C
• Maximum charge current =1C
• Open circuit voltage= 3.7-3.9V
• Cut off voltage =2.75/4.2V
• Cycle life =500 times

Applications

• It is used in different modules such as Arduino, Nodemcu, smartwatches, smart wearables, bank U-key, POS devices, Wemos, Esp8266, IoT, Bluetooth earphones, medical equipment, and some portable devices.

Package 

1 x 3.7V 100mah Lithium-ion Li-ion Battery

3.7 volt rechargeable battery type

3.7 V Lithium-Ion (Li-ion) Battery:

• It commonly used and famous due to its high energy density and less weight design. it is used for electronics such as smartphones, laptops, and cameras.

3.7 V Lithium Polymer (Li-Po) Battery:

• It is flexible, less weight design,  and is used in drones, RC vehicles, and devices where weight is the main factor
• 500mAh – Dimensions: 30mm x 20mm x 5mm
• 1000mAh – Dimensions:35mm x 25mm x 10mm
• 2200mAh – Dimensions: 60mm x 34mm x 10mm

Cylindrical lithium-ion (Li-ion) Batteries:

Cylindrical Li-ion batteries come in different sizes and commonly used sizes are 18650, 26650 and 14500.

18650 battery:

• It has an 18mm diameter and 65mm length, used for laptops, flashlights, and electric vehicles since have a balanced capacity and size.

26650 battery:

• its diameter is about 26mm and 65mm in length and used for high-drain devices such as power tools and high-performance flashlights.

• 14500 battery: With 14mm in diameter and 50mm in length, they are similar to AA batteries and are used in smaller electronics such as flashlights and portable devices.

 3.7-volt rechargeable batteries Uses

• It is used for smartphones, laptops, and cameras.
• it is part of flashlights, e-cigarettes, and gaming devices.
• Drones, RC cars, and remote-controlled devices.
• Cordless drills, saws, and battery-operated devices use them
• It also used for medical devices

voltage where 3.7-volt rechargeable battery dead

The 3.7-volt battery becomes dead when voltage losses to about 3 volts. At that point battery not store charge effectively and is replaced to avoid damage.

How long does a 3.7-volt rechargeable battery last?

Based on type its working life is different

• Li-ion battery normally comes with  300 to 500 charge cycles.
• Li-Po battery has 200 to 300 charge cycles.

 3.7-volt rechargeable battery charger

Universal Chargers:

• It can handle different types and battery sizes and provdies flexible features for batteries.

USB Chargers:

• It is easy to use and portable devices, used for small devices and powered with USB ports

Dedicated Chargers:

• It is only used for certain battery types.

How to recharge a 3.7-volt battery?

Follow these steps:

• Use the charger that supports the battery size and type. Do not use generic chargers that are not according to battery features.
• Before charging the battery check that the battery is not damaged, like swelling, leaks, or corrosion. Not recharge this affected battery
• Put the battery in the charger, and make sure accurate configuration of positive and negative terminals. Some chargers come with an indication for charger connection.
• Monitor the charging process some charge comes with an automatic off feature but some need manual working.
• Avoid overcharging battery working life and enhance the chances of fire. Remove the battery from the charger when it is completely charged.
• If the battery is not in use store it in cool and dry places and avoid sunlight and extreme conditions

Are all lithium-ion batteries 3.7V?

• The main lithium-ion battery is used as a 3.7-volt battery. So it is considered that all lithium batteries are 3.7 volts. But it is not the right answer, some batteries are lithium-ion batteries and are rated for different voltage

Why are there different Lithium-ion battery voltages?

• As mostly lithium-ion battery comes in 3.7 volts and is not the best to use. So these batteries fulfill the system demands.
• if system demands are not fulfilled use another battery. it helps to produce batteries with a voltage thatn 3.7 volts. For these conditions common lithium-ion battery as compared to 3.7 volts is 4.2 volts which can fulfill the circuit demand.

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