2 Cell Li Polymer Battery Guide and Comparison

A 2 cell Li polymer battery is a great choice for many applications, offering a high energy density and a compact design.

These batteries typically have a capacity of around 2,000 to 4,000mAh, depending on the specific model and manufacturer.

They are often used in portable electronics, such as power tools, flashlights, and other gadgets, due to their lightweight and compact nature.

One of the key benefits of 2 cell Li polymer batteries is their ability to be charged quickly, often taking around 1-2 hours to reach full capacity.

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2 Cell Li Polymer is a type of rechargeable battery that uses lithium polymer chemistry in a 2 cell configuration.

It's a relatively small battery, typically used in portable electronics like smartwatches and fitness trackers.

The 2 cell configuration means it has two separate cells, each containing a lithium polymer electrolyte and electrodes.

This design allows for a compact and lightweight battery that still packs a decent punch.

A 2 Cell Li Polymer battery usually has a nominal voltage of 3.7 volts and a capacity of around 100-200 milliampere-hours (mAh).

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A 2S LiPo battery has a nominal voltage of 7.4V, which is crucial to consider when shopping for one.

The voltage of a 2S LiPo battery is 7.4V nominal, and it can reach up to 8.4V when fully charged.

A higher C-rating means the battery can deliver more current, making it suitable for high-performance applications.

Here are some key characteristics of 2S LiPo batteries at a glance:

A 2S LiPo battery has a nominal voltage of 7.4V.

The voltage of a 2S LiPo battery increases to 8.4V when it's fully charged.

For high-performance applications, you'll want a battery that can deliver high discharge rates.

A battery's C-Rating indicates its discharge rate, with higher ratings meaning it can deliver more current.

Here's a rough guide to C-Rating:

A battery's size and weight are crucial factors to consider, as they must fit your device's battery compartment.

The connector type on your battery must be compatible with your device.

A 2S LiPo battery is designed to be lightweight and flexible, making it suitable for high-performance applications.

By considering these key characteristics, you can choose the right battery for your needs and ensure optimal performance.

In terms of composition, 2S LiPo batteries differ from lithium-ion batteries in several key ways.

The cathode of a 2S LiPo battery is made up of lithium-metal oxide, specifically LiCoO2.

Lithium-ion batteries, on the other hand, can have a variety of cathode materials, including lithium-metal oxide, LiCoO2, LiMn2O4, and LiFePO4.

The anode of a 2S LiPo battery is graphite, while newer lithium-ion battery designs sometimes use silicon or lithium titanate.

Graphite is also commonly used in lithium-ion batteries, but some designs opt for alternative materials.

Here's a breakdown of the key components of 2S LiPo and lithium-ion batteries:

The electrolyte of a 2S LiPo battery is a polymer gel, whereas lithium-ion batteries use a liquid organic solvent with lithium salts.

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The separator in a 2S LiPo battery is a polymer membrane, while lithium-ion batteries typically use a microporous membrane made of polyethylene or polypropylene.

The current collectors in both 2S LiPo and lithium-ion batteries are aluminum for the cathode and copper for the anode.

The casing of a 2S LiPo battery is a flexible polymer pouch, whereas lithium-ion batteries come in a rigid metal or plastic casing.

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Lithium-ion batteries use a lithium compound as the positive electrode material.

The term "lithium-ion battery" is often abbreviated as Li-ion.

These batteries typically use graphite as the negative electrode material.

Lithium compounds are used in the cathode material of these batteries.

The cathode material is a crucial component in determining the battery's overall performance.

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2S LiPo batteries come in a range of capacities, measured in milliampere-hours (mAh). A 2S LiPo battery with a capacity of 2000mAh can provide 2000 milliamps of current for one hour.

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The capacity of a 2S LiPo battery determines its run time, with higher capacities offering longer run times. For example, a 500mAh battery is suitable for small electronic projects, while a 3000mAh battery is better suited for high-power applications.

Here's a breakdown of typical capacity ranges for 2S LiPo batteries:

It's essential to choose a battery with the right capacity for your specific needs to ensure optimal performance and prevent overheating or damage.

Energy Density is a key characteristic that affects how long a battery can power your device.

Lithium-ion batteries have a high energy density, which means they can store a large amount of energy relative to their weight and volume. This is one of their primary advantages, making them a popular choice for many portable electronic devices and electric vehicles.

According to the performance comparison chart, lithium-ion batteries have an energy density of 150-250 Wh/kg, which is comparable to 2S LiPo batteries with an energy density of 130-200 Wh/kg.

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However, lithium-ion batteries are more energy-dense than 2S LiPo batteries, making them a better choice for devices that require a lot of power.

Here's a comparison of the energy densities of different battery types:

This difference in energy density can affect how long a battery lasts and how much power it can provide.

Discharge Rates are a crucial aspect of LiPo batteries, and understanding them is essential for choosing the right battery for your needs.

A high discharge rate means a battery can deliver a lot of power quickly, which is important for applications like RC models and drones. Typically, 2S LiPo batteries have a Max Discharge Rate of 30C or higher.

The C rating is a measure of a battery's discharge rate, and it's calculated by dividing the battery's capacity by the amount of current it can deliver. For example, a 2000mAh battery with a 20C rating can safely deliver up to 40A of current.

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To put this in perspective, a 2000mAh battery with a 10C rating can deliver 20A of current, which is still a lot of power. But it's not as much as the 40A delivered by the 20C rated battery.

Here's a quick comparison of the Max Discharge Rate of 2S LiPo and lithium-ion batteries:

As you can see, 2S LiPo batteries have a much higher Max Discharge Rate than lithium-ion batteries, making them better suited for high-performance applications.

A 2S LiPo battery provides a higher voltage of 7.4V nominal, which can be beneficial for applications requiring more power. This higher voltage can be advantageous in several ways, including reduced current draw for the same power output.

The higher voltage of a 2S LiPo battery can also lead to potential for smaller wire gauges in the device and fewer cells needed for high-voltage applications. However, it's essential to note that many devices are designed for specific voltage ranges, so the higher voltage of a 2S LiPo may not always be an advantage.

A key advantage of 2S LiPo batteries is their ability to deliver large amounts of current quickly, making them ideal for high-performance devices. They can often sustain discharge rates of 30C or higher, meaning a 2000mAh battery could potentially deliver 60A continuously.

However, the high discharge rates of LiPo batteries come with trade-offs, including reduced cycle life when frequently discharged at high rates and increased heat generation. This can lead to potential for reduced overall capacity.

Here's a comparison of the discharge rates of LiPo and lithium-ion batteries:

Overall, the voltage and power output of a 2S LiPo battery make it an excellent choice for high-performance devices, but it's crucial to understand its limitations and potential trade-offs.

Charging a 2S LiPo battery requires a charger designed to handle LiPo batteries and charge multiple cells safely.

A balance charger is essential to prevent overcharging or undercharging of individual cells, which can extend battery life and improve safety. These chargers ensure that both cells are charged equally.

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Smart chargers come with built-in safety features like overcharge protection, temperature monitoring, and automatic cutoffs when the battery is fully charged.

To ensure safe charging, look for a charger that provides a 4.2V per cell charge and supports the current output appropriate for your battery's capacity.

Here's a table summarizing the key charger specifications:

Discharging a 2S LiPo battery can be done safely with a charger that supports the battery's discharge rate. A 2000mAh battery with a 20C rating can safely deliver up to 40A of current.

Make sure to follow the manufacturer's guidelines for charging and discharging your specific 2S LiPo battery.

LiPo batteries can be safely charged at higher rates than traditional lithium-ion batteries. In fact, many LiPo batteries can be charged at 1C or even 2C rates.

A 1C charge rate means charging a battery at the same rate it can discharge its energy, which is typically measured in milliampere-hours (mAh). For example, a 2000mAh battery charged at a 1C rate would take about 2 hours to fully charge.

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Most consumer lithium-ion batteries, on the other hand, are charged at slower rates, typically between 0.5C and 1C. This helps preserve long-term capacity and reduces stress on the battery.

To give you a better idea, here's a rough estimate of how long it takes to charge a LiPo battery at different charge rates:

Keep in mind that these are general guidelines and the actual charge time may vary depending on the specific battery and charger you're using.

2S LiPo batteries can support several hundred charging/discharging cycles, but this depends on various factors such as battery quality and temperature.

The quality of the battery charger and cell balancing also plays a significant role in determining the number of cycles a battery can handle.

It's essential to make a few test charging/discharging cycles when a new battery arrives, with a gradual increase in Depth of Discharge (DoD).

Here's an example of how to do this:

After each charging and discharging, let the battery cool down to prevent any damage.

A 3400mAh rechargeable battery with a PCM (Protection Circuit Module) and Molex connector is a great option for powering your devices. This type of battery is designed to provide a safe and reliable charging experience.

The 2S configuration means it has two cells in series, which is a common setup for many devices. For example, the 7.4V Rechargeable Li Polymer Battery Pack LP4360113 has a 2S configuration with a capacity of 3400mAh.

A PCM is an essential feature for any rechargeable battery, as it helps prevent overcharging and overheating. This is especially important for lithium-ion batteries like the one mentioned above.

The battery's voltage is 7.4V, which is a common voltage for many devices that require a 2S setup. The Molex connector provides a secure and reliable connection to your device.

Here are some key specifications for this type of battery:

This type of battery is perfect for devices that require a high capacity and reliable power source.

LiPo batteries are indeed more sensitive to physical damage due to their soft pouch construction, making them more prone to punctures and fires if mishandled. This is why it's crucial to handle them with care.

A single puncture or severe damage can lead to a fire, so it's essential to use specialized chargers with cell balancing capabilities to ensure safe operation. These chargers help prevent overcharging and over-discharging, which can also cause damage.

To avoid any potential risks, it's recommended to store and transport LiPo batteries in fireproof bags, like the Zeee Fireproof and Explosion-proof LiPo Battery Bag. This simple precaution can help prevent overheating or even bursting into flames.

Here are some safety considerations to keep in mind:

By following these guidelines, you can ensure safe and reliable operation of your 2S LiPo battery.

LiPo batteries are generally more sensitive to physical damage and mishandling due to their soft pouch construction.

However, proper care and adherence to manufacturer guidelines can ensure safe operation.

LiPo batteries require specialized chargers with cell balancing capabilities.

They also should not be discharged below 3.0V per cell.

In contrast, lithium-ion batteries are more resistant to physical damage due to their rigid casing.

But they still pose a fire risk if damaged or improperly charged.

Many modern devices include built-in protection circuits.

Here's a comparison of the safety considerations for both battery types:

Both battery types can be safely used with proper care and adherence to manufacturer guidelines.

A 2S LiPo battery can last for 300 to 500 charge cycles, which translates to about 1 to 3 years of regular use.

The lifespan of a 2S LiPo battery depends on several factors, including its quality, usage patterns, and maintenance practices.

Regularly discharging a 2S LiPo battery below its safe limit of 6.0V (3.0V per cell) can significantly reduce its lifespan, so try to keep the battery above 20-30% charge whenever possible.

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Using a compatible charger and adhering to the maximum voltage of 8.4V (4.2V per cell) for standard batteries ensures safety and longevity.

Storing a 2S LiPo battery at storage voltage (7.6-7.8V) and keeping it in a cool, dry environment can prevent cell degradation.

Here are some key factors to keep in mind when using a 2S LiPo battery:

The S-82A2A/B/C Series is a protection IC designed to safeguard lithium-ion and lithium polymer rechargeable batteries. This IC includes high-accuracy voltage detection circuits and delay circuits.

It's suitable for protecting 2-serial-cell lithium-ion and lithium polymer rechargeable battery packs from overcharge, overdischarge, and overcurrent. This means you can rely on it to keep your batteries safe and prevent damage.

The S-82A2A/C Series has a CTL pin for charge-discharge control signal, allowing for charge-discharge control with an external signal. This feature is super useful for managing your battery's charge and discharge cycles.

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The S-82A2B Series, on the other hand, has a PS pin for power-saving signal, enabling reduction of current consumption by using an external signal to start the power-saving function. This can help prolong the battery's lifespan.

Here's a breakdown of the overcharge and overdischarge release voltages:

Note that the overcharge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.4 V in 50 mV step, while the overdischarge hysteresis voltage can be selected as 0 V or from a range of 0.1 V to 0.7 V in 100 mV step.

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Ufine Battery is a custom lithium battery manufacturer from China, offering a range of lithium polymer batteries, including 2S LiPo batteries.

They are known for their consistent quality, long cycle life, and comprehensive safety features, making them a reliable choice for 2S LiPo batteries.

Tattu is another top manufacturer, prioritizing safety and quality in their battery design, with premium 2S LiPo batteries featuring high energy density and low internal resistance.

Thunder Power is a premium LiPo battery manufacturer focusing on high-performance, low-resistance cells, with a focus on attention to detail and advanced manufacturing processes.

Rhino specializes in 2S LiPo batteries designed for heavy-duty applications, offering rugged, high-discharge-rate batteries with excellent durability and safety features.

Multistar, owned by Hobbyking, provides affordable and reliable 2S LiPo batteries with a good balance of performance and value across various capacities and discharge rates.

Gens Ace is a reputable manufacturer of high-quality 2S LiPo batteries, known for their exceptional performance, long cycle life, and comprehensive safety features.

Lectron Pro focuses on advanced cell chemistry, strict quality control, and innovative safety features, making them a high-quality and high-performance 2S LiPo battery manufacturer.

MaxAmps specializes in high-capacity, high-discharge-rate 2S LiPo batteries, offering exceptional power delivery and extended runtime.

Ufine Battery is a custom lithium battery manufacturer from China, known for their consistent quality, long cycle life, and comprehensive safety features. They can customize batteries of different sizes, capacities, and voltages according to customer needs.

Tattu is known for its premium 2S LiPo batteries with high energy density, low internal resistance, and reliable performance. They prioritize safety and quality in their battery design.

Thunder Power is a premium LiPo battery manufacturer focusing on high-performance, low-resistance cells. They're known for their attention to detail and advanced manufacturing processes.

Rhino specializes in 2S LiPo batteries designed for heavy-duty applications, offering rugged, high-discharge-rate batteries with excellent durability and safety features. These batteries are built to last.

Multistar, owned by Hobbyking, offers affordable and reliable 2S LiPo batteries that provide a good balance of performance and value across various capacities and discharge rates. They're a great option for those on a budget.

Gens Ace is a reputable manufacturer of high-quality 2S LiPo batteries, known for their exceptional performance, long cycle life, and comprehensive safety features. Their batteries are reliable and long-lasting.

Lectron Pro focuses on advanced cell chemistry, strict quality control, and innovative safety features, resulting in high-quality and high-performance 2S LiPo batteries. Their batteries are a cut above the rest.

MaxAmps specializes in high-capacity, high-discharge-rate 2S LiPo batteries, offering exceptional power delivery and extended runtime. These batteries are perfect for demanding applications.

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The Rechargeable Pack LP402040 with Protection is a reliable option for powering your devices. It's a 2S 7.4V lithium-ion polymer battery pack with a capacity of 300mAh.

This pack features a protection circuit (PCM) that safeguards against overcharge, overdischarge, and overcurrent. The PCM includes high-accuracy voltage detection circuits and delay circuits for reliable protection.

The LP402040 pack has a watthour rating of 2.22Wh and weighs approximately 4.0g. It's a compact and lightweight option for powering small devices.

Here are some key specifications of the LP402040 pack:

This pack is a great option for powering small devices, and its compact size makes it easy to integrate into your projects.

A 2S LiPo battery is essentially two individual cells connected in series, combining their voltages to deliver a nominal voltage of 7.4 volts.

The "2S" in a 2S LiPo battery stands for "2 Series", which indicates the connection method of the cells. This is important to know because it affects how the battery performs and how you should use it.

A well-maintained 2S LiPo battery can last for 300 to 500 charge cycles, which translates to about 1 to 3 years of regular use. This estimate can vary based on how the battery is used and cared for.

To prolong battery life, it's recommended to avoid deep discharges and instead keep the battery above 20-30% charge whenever possible. Discharging a 2S LiPo battery below its safe limit of 6.0V (3.0V per cell) can significantly reduce its lifespan.

Here are the key factors influencing the lifespan of a 2S LiPo battery:

A 2S LiPo battery is a very popular battery type used in various applications, from small RC toys to larger RC trucks.

LiPo 2S batteries typically consist of two lithium polymer cells connected in series, with a nominal voltage of 3.7 volts and a maximum charging voltage of 4.2 volts.

The battery configuration can vary, with some 2S LiPo batteries having a 2S1P configuration and others having a 2S2P configuration.

In terms of capacity, 2S LiPo batteries can range from 200mAh to 4000mAh, with some examples including a 200mAh battery and a 4000mAh battery.

The weight of 2S LiPo batteries can also vary, with some weighing around 4.0g and others weighing around 80.0g.

A protection circuit (PCM) is often included in 2S LiPo batteries to prevent overcharging and over-discharging.

A high C-rating means a battery can be discharged quickly, which is essential for applications that require bursts of high power. This is crucial for racing drones or high-speed RC cars.

A battery's C-rating is calculated by multiplying its capacity in milliampere-hours (mAh) by its C-rating. For example, a 2000mAh battery with a 20C rating can safely discharge at 40,000mA.

Low-power devices like small drones or lightweight RC vehicles can get by with a 10C to 20C discharge rate. This means a 2000mAh 2S LiPo battery can safely discharge at 20A to 40A.

For more demanding applications like mid-range drones, RC cars, or airsoft guns, you might need a 25C to 30C discharge rate. This would allow a 2200mAh 2S LiPo battery to discharge at 55A to 66A.

Here's a breakdown of the recommended C-ratings for different types of devices:

High-performance drones, racing RC cars, or other high-power applications may require batteries with 40C to 60C or even higher discharge rates. A 2000mAh 2S LiPo battery with a 50C discharge rate can safely discharge at 100A.

LiPo 2S batteries typically consist of two lithium polymer cells connected in series, with a nominal voltage of 3.7 volts per cell.

Most LiPo cells used in 2S batteries have a maximum charging voltage of 4.2 volts.

The configuration of 2S batteries is often referred to as 2S1P, meaning two cells in series and one pack.

A 2S 7.4V Li Polymer Battery can have a capacity ranging from 1600mAh to 4000mAh, depending on the specific model.

The Wat-Hour (Wh) rating of a 2S battery is calculated by multiplying the voltage by the capacity, resulting in a rating of 11.84Wh to 14.8Wh.

The weight of a 2S battery can range from approximately 4.0g to 80.0g, depending on the size and capacity of the battery.

Some 2S batteries come equipped with a Protection Circuit Module (PCM) for added safety and protection.

The voltage of a 2S battery is typically 7.4V, which is the sum of the two 3.7V cells connected in series.

A 2S battery can have a capacity as low as 200mAh or as high as 3600mAh, depending on the specific model.

The configuration of some 2S batteries is 2S2P, meaning two pairs of cells connected in series.

The weight of some 2S batteries can be as high as 72.0g, depending on the size and capacity of the battery.

Some 2S batteries come equipped with a thermistor (NTC) for added protection and safety.

A 2S battery can have a Wat-Hour rating of up to 15.54Wh, depending on the capacity and voltage of the battery.

2S LiPo batteries come with two sets of cables, but they're not always a perfect match for your devices. Discharging cables feature thick wires to minimize energy losses, often with Dean T connectors that are standard for low to moderate currents.

These connectors are usually found on devices intended for 2S LiPo batteries. Charging cables, on the other hand, are much thinner and typically feature JST-XH or similar plugs that allow the charger to monitor and balance each cell individually.

If you receive a battery with the wrong plugs, don't worry – there are adapters available that can help you connect it to your device or charger. However, each connection adds some resistance, increasing energy losses, so it's best to avoid them if possible.

Here's a quick rundown of the common connectors you might find on 2S LiPo batteries:

The capacity of a 2S LiPo battery is measured in milliampere-hours (mAh), which indicates how much charge it can hold and how long it can power your device. A 2S LiPo battery with a capacity of 2000mAh can provide 2000 milliamps of current for one hour.

For small electronic projects, a 2S LiPo battery with a capacity of 500mAh to 1300mAh is a good choice. These batteries are lightweight and offer a good balance between size and runtime.

For medium-sized drones and RC vehicles, a 2S LiPo battery with a capacity of 1500mAh to 2200mAh is suitable. These batteries provide more runtime without significantly increasing the weight.

Here are some general guidelines for 2S LiPo battery capacities:

When choosing a 2S LiPo battery, the first thing to consider is capacity. The capacity of a 2S LiPo battery is measured in milliampere-hours (mAh), which indicates how much charge it can hold and how long it can power your device.

A 2S LiPo battery with a capacity of 2000mAh can provide 2000 milliamps of current for one hour. The higher the capacity, the longer the run time.

There are different capacity ranges for 2S LiPo batteries, each suited for specific applications. For example, 500mAh – 1300mAh batteries are often used in lightweight drones, RC cars, or small electronic projects.

These smaller capacity batteries offer a good balance between size, weight, and runtime. They're a great choice for projects where you need a compact and lightweight solution.

Here are some general guidelines for choosing the right capacity for your 2S LiPo battery:

A 3600mAh battery is a great choice for powering your devices. It's a 2S LiPo battery, which means it has a voltage of 7.4V.

You'll find that 3600mAh batteries are commonly used in high-power applications that require longer operation time. They're a good fit for RC models, airsoft guns, and larger RC vehicles.

The weight of a 3600mAh battery is approximately 72.0g, which is relatively heavy compared to smaller capacity batteries. This is because larger capacity batteries often come with a tradeoff in size and weight.

A 3600mAh battery has a wat-hou rating of 13.32Wh, which indicates its energy capacity. This is a useful metric for determining how long your device will run on a single charge.

Here's a breakdown of the capacity ranges for 2S LiPo batteries:

A 3600mAh battery falls into the high-power application category, making it suitable for demanding devices that require a lot of power.

Capacity is a crucial aspect of 2S LiPo batteries, measured in milliampere-hours (mAh). This indicates how much charge the battery can hold and how long it can power your device.

A battery's capacity determines its runtime, with higher capacities providing longer operation times. For example, a 2S LiPo battery with a capacity of 2000mAh can provide 2000 milliamps of current for one hour.

Batteries with smaller capacities, such as 500mAh to 1300mAh, are ideal for lightweight drones, RC cars, or small electronic projects. They offer a good balance between size, weight, and runtime.

Larger capacity batteries, ranging from 3000mAh to 5000mAh, are used in high-power applications that require longer operation times. These batteries offer longer run times but come with a tradeoff in size and weight.

Here's a breakdown of common 2S LiPo battery capacities and their typical applications:

It's essential to choose a battery with a suitable capacity for your specific needs to ensure optimal performance and runtime.