A Seller's Guide to the AS18650 25.9V 2Ah Lithium-Ion Battery: Specifications and Applications
Release time：2024-09-18 Click：36
The world of rechargeable batteries has witnessed significant advancements, and among the
most popular types is the 18650 lithium-ion battery. Known for its compact size and high
energy density, the 18650 cell has become a staple for various electronic devices and applications.
Among the many configurations, the 18650 25.9V 2Ah lithium-ion battery stands out as a practical
and efficient option. In this guide, we’ll take a detailed look at the key aspects of this battery from a
seller’s perspective, including its specifications, size, weight, and application areas.
The 18650 battery is named after its dimensions—18mm in diameter and 65mm in length. These
cylindrical cells are the cornerstone of many rechargeable devices due to their superior performance,
durability, and high energy density. A 25.9V 2Ah battery pack consists of several 18650 cells connected
in a series and parallel arrangement to deliver a nominal voltage of 25.9V and a capacity of 2Ah.
While this particular battery may not offer the highest capacity, it excels in compactness and efficiency,
making it ideal for specific applications that demand moderate power without the need for bulky or
heavy battery packs.
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l Voltage: 25.9V (nominal)
l Capacity: 2Ah
l Configuration: Typically, this battery consists of a 7S1P configuration (7 cells in series, 1 in parallel).
l Battery Type: Lithium-ion (Li-ion)
l Dimensions: Dependent on the arrangement of the cells within the pack, but typically compact.
l Weight: Approximately 400-500g depending on additional components like the Battery Management
System (BMS) and protective casing.
l Energy Capacity: 51.8Wh (watt-hours)
The 25.9V rating refers to the nominal voltage of the battery pack, which can fluctuate slightly between
charging and discharging cycles. The 2Ah (Ampere-hour) capacity represents the battery’s ability to deliver
a continuous current of 2A for one hour before depletion. This results in a total energy capacity of 51.8 watt-hours,
which is sufficient for various moderate-power applications.
When considering a battery, especially for portable or space-constrained applications, size and weight are critical
factors. One of the main advantages of the 18650 25.9V 2Ah battery is its compact size and lightweight design,
made possible by the efficiency of lithium-ion technology.
The 18650 cells themselves are 18mm in diameter and 65mm in length, but when arranged into a battery pack,
the overall size depends on the configuration and the protective casing used to enclose the cells. In a typical 7S1P
arrangement, the cells are stacked in a way that optimizes space, resulting in a battery pack that may measure
between 150mm to 200mm in length, 40mm to 60mm in width, and 20mm to 40mm in thickness.
Lithium-ion batteries are known for their high energy density, meaning they offer more power in a lighter
package compared to older battery chemistries such as lead-acid or nickel-cadmium (NiCd). The 18650 25.9V 2Ah
battery generally weighs between 400g and 500g, depending on the inclusion of a BMS, wiring, and other protective
components. This light weight is advantageous for applications where minimizing mass is important, such as in drones,
handheld devices, or wearable technology.
Though compact, the 18650 25.9V 2Ah battery has a wide range of applications due to its combination of modest
capacity, reliability, and small size. Below are some key areas where this battery type is widely used:
The world of consumer electronics is always in need of reliable, lightweight, and efficient batteries. The 25.9V 2Ah
battery is an excellent choice for mid-range electronic devices that require moderate power levels. Typical devices include:
Portable speakers: Bluetooth-enabled speakers need compact battery packs that provide adequate power for extended
playback times without adding too much weight or bulk.
Handheld gadgets: Devices such as digital cameras, small handheld projectors, and VR controllers benefit from this
battery’s compact size and efficiency.
With the rise of electric scooters and other lightweight personal transportation devices, batteries like the 18650 25.9V
2Ah have found a place in the market. These devices prioritize portability and low weight, and the 25.9V voltage level
is ideal for driving small electric motors for short distances. The battery provides sufficient energy for short commutes
or leisure rides while remaining light enough to avoid weighing down the vehicle.
Drones, remote-controlled cars, boats, and other toys require powerful but lightweight batteries to maximize flight or
operation time. The 18650 25.9V 2Ah battery offers just the right balance of power and lightness, allowing drones to
stay in the air longer without being weighed down by heavy batteries. It also supports high discharge rates, enabling
these devices to achieve the performance needed during bursts of activity such as acceleration or sudden maneuvers.
The healthcare industry often relies on battery-powered medical devices that must be portable and reliable.
Devices like portable oxygen concentrators, infusion pumps, and other life-sustaining medical equipment need
compact, lightweight batteries that provide consistent power. The 25.9V 2Ah battery fits well into this category,
offering enough power for extended use while remaining small enough to be easily integrated into portable devices.
Robots, especially those designed for education, research, or hobbyist applications, require reliable power
sources that can handle continuous operation for several hours. The 18650 25.9V 2Ah battery is often used
in smaller robots or robotic arms where size and weight constraints are crucial. Its ability to provide stable
voltage over time makes it a perfect choice for robotic systems.
For hobbyists, engineers, and DIY enthusiasts, the 18650 25.9V 2Ah battery is a popular choice for building
and testing prototypes. Whether it’s creating portable electronics, building custom drones, or developing
IoT (Internet of Things) devices, the compact size and manageable capacity of this battery make it ideal
for small-scale projects that require a reliable power source.
When compared to other types of batteries, the 18650 25.9V 2Ah lithium-ion battery offers several advantages
that make it an attractive option for a wide range of applications. Below are some of the key benefits:
One of the standout features of this battery is its small size and light weight. For applications where space
and weight are important considerations, such as drones, portable electronics, and wearables, the 25.9V 2Ah
battery provides ample power without being bulky or heavy.
Compared to older battery technologies like lead-acid or nickel-cadmium, lithium-ion batteries offer significantly
higher energy densities. This means they can store more energy in a smaller volume, making them ideal for
applications that require compact, portable power solutions.
Lithium-ion batteries are known for their durability and long cycle life. A typical 18650 cell can undergo 500
charge-discharge cycles before its capacity begins to degrade significantly. With proper care, the 18650 25.9V
2Ah battery can provide years of reliable service.
One of the significant advantages of lithium-ion batteries is their low self-discharge rate. Unlike older technologies
that lose charge when left unused, lithium-ion batteries can retain their charge for extended periods, making them
ideal for devices that are not used every day but need to be ready when required.
Safety is a critical concern with lithium-ion batteries, but modern packs like the 18650 25.9V 2Ah model come
equipped with built-in safety features. These typically include overcharge protection, over-discharge protection,
short-circuit prevention, and temperature monitoring to prevent overheating. These features ensure the safe
operation of the battery, even in demanding environments.
While lithium-ion batteries are generally safe, proper handling and usage are essential to prevent accidents.
Overcharging, physical damage, and overheating can pose risks, such as fire or explosion, if not managed
correctly. It’s crucial to use a quality Battery Management System (BMS) to monitor the battery’s health
and performance. Always follow the manufacturer’s recommendations for charging, storing, and using the
battery to ensure safety.
When transporting or storing the battery, avoid extreme temperatures and exposure to water or moisture.
Additionally, ensure that the battery is charged with a compatible charger to prevent overcharging or damage
to the cells.
The 18650 25.9V 2Ah lithium-ion battery is a powerful, compact, and versatile energy solution that excels in
various applications, including consumer electronics, electric scooters, drones, medical devices, and robotics.
With its high energy density, long cycle life, and lightweight design, it provides an ideal power source for users
who need reliable and portable energy without sacrificing performance.
As a seller, offering the 18650 25.9V 2Ah battery allows you to cater to a wide range of industries and applications.
Whether your customers are looking for a reliable battery for their DIY projects, electric mobility solutions, or medical
devices, this battery provides a well-rounded solution that meets the needs of modern energy demands. With the
growth of portable electronics and electric vehicles, the demand for efficient and compact lithium-ion batteries like
the 18650 25.9V 2Ah is only set to increase.
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