3.7v rechargeable battery

A 3.7V rechargeable  battery, often referred to as a Li-ion battery, is a type of rechargeable battery commonly used in a wide range of electronic devices, including smartphones, laptops, digital cameras, and many other portable devices. Here are some key specifications and information about 3.7V Li-ion batteries:

More about the 3.7v rechargeable battery :

1. Voltage: As the name suggests, these batteries have a nominal voltage of 3.7 volts. However, the voltage can vary slightly depending on the specific chemistry and state of charge. The voltage range typically falls between 3.0V when discharged and 4.2V when fully charged.
2. Capacity (mAh): The capacity of a Li-ion battery is usually measured in milliampere-hours (mAh) or ampere-hours (Ah). It represents the amount of electric charge the battery can store. Common capacities for 3.7V Li-ion batteries range from a few hundred mAh for small applications to several thousand mAh for larger devices. Higher capacity batteries generally provide longer runtimes.
3. Chemistry: Li-ion batteries use lithium-ion technology for energy storage. The most common chemistries used in a 3.7v rechargeable battery include lithium cobalt oxide (LiCoO2), lithium manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), and lithium nickel cobalt manganese oxide (LiNiCoMnO2 or NMC). Each chemistry has its own advantages and disadvantages in terms of energy density, safety, and cycle life.
4. Charging and Discharging: Li-ion batteries are known for their high energy density, which means they can store a significant amount of energy relative to their size and weight. They are designed to be rechargeable and can undergo hundreds to thousands of charge-discharge cycles before their capacity significantly degrades.
5. Voltage Characteristics: The voltage of a Li-ion battery remains relatively stable during most of its discharge cycle. It starts at or near its nominal voltage and gradually decreases as it discharges. This stable voltage output is one reason why Li-ion batteries are preferred for many applications.
6. Safety: Proper handling and charging are essential to ensure the safety of Li-ion batteries. Overcharging, puncturing, or exposing them to extreme temperatures can lead to thermal runaway and potential fire hazards. Most Li-ion batteries have built-in protection circuits to mitigate these risks.
7. Size and Form Factors: 3.7V Li-ion batteries come in various sizes and shapes, including cylindrical cells, prismatic cells, and pouch cells. The choice of form factor depends on the specific application and device design.
8. Charging: a 3.7v rechargeable battery requires specific charging methods to ensure their longevity and safety. They typically need a constant current-constant voltage (CC-CV) charging profile, and the charging voltage should not exceed the manufacturer’s recommended maximum voltage.
9. Applications: 3.7V Li-ion batteries are widely used in portable electronics, electric vehicles (EVs), power banks, drones, and many other devices where a lightweight, rechargeable power source is needed.
10. Lifespan: The lifespan of a 3-7v rechargeable battery depends on factors such as the chemistry, usage patterns, and operating conditions. In general, well-maintained Li-ion batteries can last several years.
11. Environmental Impact: Li-ion batteries are considered more environmentally friendly than some other battery types, such as lead-acid batteries, due to their lower toxicity and longer lifespan. However, their production and disposal still have environmental considerations, and recycling programs for lithium-ion batteries are becoming increasingly important.
12. Operating Temperature Range: a 3.7v rechargeable battery  has a specified operating temperature range, typically between -20°C to 60°C (-4°F to 140°F). Operating outside this range can affect their performance and safety. Some specialized Li-ion chemistries have a wider temperature range for extreme conditions.

It’s essential to use Li-ion batteries that are compatible with the specific device and follow the manufacturer’s guidelines for charging and maintenance to maximize their lifespan and safety.

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Specifications:

Model: 18650
Capacity: 2800mAh
Rechargeable: >1000 cycle

Charge Voltage: 4.2V.
Rated Voltage: 3.7V
theoretically Chemistry: Li-ion
Color: Blue
Net Weight: About 35g/pc.
Size(HxD): 6.5X1.8cm/2.56X0.71″