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:
- Its volume density is about 300mWh
- it has a secure structure so no chances of fire, short circuit, overcharging, over current, vibration, or crush acupuncture.
- It has 80 percent capacity after 500 cycles.
- It has a 3.6 V discharge voltage plateau than 42min
- It does not have a bad affect on the environment since not come with PB, CD
- 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.
PackageÂ
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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Faqs
- its working life is about two to three years for the best condition.
- Connect the battery with charge, and charger with power source. The charger can have a boost circuit for a full charge battery of 3.6 volts. The 3.7 volts can lose to 3.2 volts and lower, connecting it with 3.6 volts supply can cause fire
- The 2.7-volt lithium battery is a lithium battery having a nominal voltage of 3.7 volts and a full-charge voltage of 4.2v.
- The voltage started from 4.2maximum and lost to 3.7 volts for most batteries. When you cross 3.4 volts battery is dead and the 3.0-volt cutoff circuit disconnects the battery
- The 3.7 lithium battery can be properly charged and loses charging when completely charged without overcharging. Easy to use connect USB cable with devices for charging without monitoring.
- If the phone is powered with a lithium-ion battery the will charge the battery about <50% using the 3.7V. For full charge use a charger.
- The main difference is that 3.7 volts than 1.2 for standard rechargeable AA and 1.5 for non-rechargeable AA. it will affect mostly electronic devices to use AA’s.
- For a nominal voltage of 3.7 volts and nominal capacity of 3000mAh, we can define it comes with a nominal energy storage of 11.1 Wh that is its output is 11.1W for 1 hour or 22.2W for 30 minutes.
- For a dead battery, the best is that let it charge overnight for low ampere to avoid stress at battery cells. The chances of battery damage due to long term is higher.
- It did not have a protection board so a guide to charge it with a 4.2 volt charger. This is since as the standard voltage of the completely charged 3.7-volt battery is 4.2 volts. If the charging volt is higher the 4.2 volt battery loses back and is not for use
- For healthy charged lead acid battery can be 12.3 Volts and 12.6 Volts based on charge level, these values different for modern lithium batteries
How many mAh is 3.7 volts?
Watt Hours (Wh) | Voltage (V) | Milliampere Hours (mAh) |
---|---|---|
1 Wh | 3.7 V | 270.27 mAh |
5 Wh | 3.7 V | 1351.35 mAh |
10 Wh | 3.7 V | 2702.7 mAh |
20 Wh | 3.7 V | 5405.41 mAh |